diff --git a/.github/ISSUE_TEMPLATE/config.yml b/.github/ISSUE_TEMPLATE/config.yml
index 47a6a4c3d3..ec57232126 100644
--- a/.github/ISSUE_TEMPLATE/config.yml
+++ b/.github/ISSUE_TEMPLATE/config.yml
@@ -2,7 +2,7 @@ blank_issues_enabled: false
 contact_links:
     - name: Help
       url: https://github.com/ppy/osu/discussions/categories/q-a
-      about: osu! not working as you'd expect? Not sure it's a bug? Check the Q&A section!
+      about: osu! not working or performing as you'd expect? Not sure it's a bug? Check the Q&A section!
     - name: Suggestions or feature request
       url: https://github.com/ppy/osu/discussions/categories/ideas
       about: Got something you think should change or be added? Search for or start a new discussion!
diff --git a/osu.Game.Rulesets.Catch/Edit/CatchBeatSnapGrid.cs b/osu.Game.Rulesets.Catch/Edit/CatchBeatSnapGrid.cs
new file mode 100644
index 0000000000..6862696b3a
--- /dev/null
+++ b/osu.Game.Rulesets.Catch/Edit/CatchBeatSnapGrid.cs
@@ -0,0 +1,180 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using osu.Framework.Allocation;
+using osu.Framework.Caching;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Shapes;
+using osu.Game.Graphics;
+using osu.Game.Rulesets.Catch.UI;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Drawables;
+using osu.Game.Rulesets.UI.Scrolling;
+using osu.Game.Screens.Edit;
+using osuTK.Graphics;
+
+namespace osu.Game.Rulesets.Catch.Edit
+{
+    /// <summary>
+    /// A grid which displays coloured beat divisor lines in proximity to the selection or placement cursor.
+    /// </summary>
+    /// <remarks>
+    /// This class heavily borrows from osu!mania's implementation (ManiaBeatSnapGrid).
+    /// If further changes are to be made, they should also be applied there.
+    /// If the scale of the changes are large enough, abstracting may be a good path.
+    /// </remarks>
+    public partial class CatchBeatSnapGrid : Component
+    {
+        private const double visible_range = 750;
+
+        /// <summary>
+        /// The range of time values of the current selection.
+        /// </summary>
+        public (double start, double end)? SelectionTimeRange
+        {
+            set
+            {
+                if (value == selectionTimeRange)
+                    return;
+
+                selectionTimeRange = value;
+                lineCache.Invalidate();
+            }
+        }
+
+        [Resolved]
+        private EditorBeatmap beatmap { get; set; } = null!;
+
+        [Resolved]
+        private OsuColour colours { get; set; } = null!;
+
+        [Resolved]
+        private BindableBeatDivisor beatDivisor { get; set; } = null!;
+
+        private readonly Cached lineCache = new Cached();
+
+        private (double start, double end)? selectionTimeRange;
+
+        private ScrollingHitObjectContainer lineContainer = null!;
+
+        [BackgroundDependencyLoader]
+        private void load(HitObjectComposer composer)
+        {
+            lineContainer = new ScrollingHitObjectContainer();
+
+            ((CatchPlayfield)composer.Playfield).UnderlayElements.Add(lineContainer);
+
+            beatDivisor.BindValueChanged(_ => createLines(), true);
+        }
+
+        protected override void Update()
+        {
+            base.Update();
+
+            if (!lineCache.IsValid)
+            {
+                lineCache.Validate();
+                createLines();
+            }
+        }
+
+        private readonly Stack<DrawableGridLine> availableLines = new Stack<DrawableGridLine>();
+
+        private void createLines()
+        {
+            foreach (var line in lineContainer.Objects.OfType<DrawableGridLine>())
+                availableLines.Push(line);
+
+            lineContainer.Clear();
+
+            if (selectionTimeRange == null)
+                return;
+
+            var range = selectionTimeRange.Value;
+
+            var timingPoint = beatmap.ControlPointInfo.TimingPointAt(range.start - visible_range);
+
+            double time = timingPoint.Time;
+            int beat = 0;
+
+            // progress time until in the visible range.
+            while (time < range.start - visible_range)
+            {
+                time += timingPoint.BeatLength / beatDivisor.Value;
+                beat++;
+            }
+
+            while (time < range.end + visible_range)
+            {
+                var nextTimingPoint = beatmap.ControlPointInfo.TimingPointAt(time);
+
+                // switch to the next timing point if we have reached it.
+                if (nextTimingPoint.Time > timingPoint.Time)
+                {
+                    beat = 0;
+                    time = nextTimingPoint.Time;
+                    timingPoint = nextTimingPoint;
+                }
+
+                Color4 colour = BindableBeatDivisor.GetColourFor(
+                    BindableBeatDivisor.GetDivisorForBeatIndex(beat, beatDivisor.Value), colours);
+
+                if (!availableLines.TryPop(out var line))
+                    line = new DrawableGridLine();
+
+                line.HitObject.StartTime = time;
+                line.Colour = colour;
+
+                lineContainer.Add(line);
+
+                beat++;
+                time += timingPoint.BeatLength / beatDivisor.Value;
+            }
+
+            // required to update ScrollingHitObjectContainer's cache.
+            lineContainer.UpdateSubTree();
+
+            foreach (var line in lineContainer.Objects.OfType<DrawableGridLine>())
+            {
+                time = line.HitObject.StartTime;
+
+                if (time >= range.start && time <= range.end)
+                    line.Alpha = 1;
+                else
+                {
+                    double timeSeparation = time < range.start ? range.start - time : time - range.end;
+                    line.Alpha = (float)Math.Max(0, 1 - timeSeparation / visible_range);
+                }
+            }
+        }
+
+        private partial class DrawableGridLine : DrawableHitObject
+        {
+            public DrawableGridLine()
+                : base(new HitObject())
+            {
+                RelativeSizeAxes = Axes.X;
+                Height = 2;
+
+                AddInternal(new Box { RelativeSizeAxes = Axes.Both });
+            }
+
+            [BackgroundDependencyLoader]
+            private void load()
+            {
+                Origin = Anchor.BottomLeft;
+                Anchor = Anchor.BottomLeft;
+            }
+
+            protected override void UpdateInitialTransforms()
+            {
+                // don't perform any fading – we are handling that ourselves.
+                LifetimeEnd = HitObject.StartTime + visible_range;
+            }
+        }
+    }
+}
diff --git a/osu.Game.Rulesets.Catch/Edit/CatchHitObjectComposer.cs b/osu.Game.Rulesets.Catch/Edit/CatchHitObjectComposer.cs
index 8afeca3e51..f2877572e8 100644
--- a/osu.Game.Rulesets.Catch/Edit/CatchHitObjectComposer.cs
+++ b/osu.Game.Rulesets.Catch/Edit/CatchHitObjectComposer.cs
@@ -33,6 +33,8 @@ namespace osu.Game.Rulesets.Catch.Edit
 
         private InputManager inputManager = null!;
 
+        private CatchBeatSnapGrid beatSnapGrid = null!;
+
         private readonly BindableDouble timeRangeMultiplier = new BindableDouble(1)
         {
             MinValue = 1,
@@ -65,6 +67,8 @@ namespace osu.Game.Rulesets.Catch.Edit
                 Catcher.BASE_DASH_SPEED, -Catcher.BASE_DASH_SPEED,
                 Catcher.BASE_WALK_SPEED, -Catcher.BASE_WALK_SPEED,
             }));
+
+            AddInternal(beatSnapGrid = new CatchBeatSnapGrid());
         }
 
         protected override void LoadComplete()
@@ -74,6 +78,29 @@ namespace osu.Game.Rulesets.Catch.Edit
             inputManager = GetContainingInputManager();
         }
 
+        protected override void UpdateAfterChildren()
+        {
+            base.UpdateAfterChildren();
+
+            if (BlueprintContainer.CurrentTool is SelectTool)
+            {
+                if (EditorBeatmap.SelectedHitObjects.Any())
+                {
+                    beatSnapGrid.SelectionTimeRange = (EditorBeatmap.SelectedHitObjects.Min(h => h.StartTime), EditorBeatmap.SelectedHitObjects.Max(h => h.GetEndTime()));
+                }
+                else
+                    beatSnapGrid.SelectionTimeRange = null;
+            }
+            else
+            {
+                var result = FindSnappedPositionAndTime(inputManager.CurrentState.Mouse.Position);
+                if (result.Time is double time)
+                    beatSnapGrid.SelectionTimeRange = (time, time);
+                else
+                    beatSnapGrid.SelectionTimeRange = null;
+            }
+        }
+
         protected override double ReadCurrentDistanceSnap(HitObject before, HitObject after)
         {
             // osu!catch's distance snap implementation is limited, in that a custom spacing cannot be specified.
diff --git a/osu.Game.Rulesets.Catch/UI/CatchPlayfield.cs b/osu.Game.Rulesets.Catch/UI/CatchPlayfield.cs
index cf7337fd0d..f091dee845 100644
--- a/osu.Game.Rulesets.Catch/UI/CatchPlayfield.cs
+++ b/osu.Game.Rulesets.Catch/UI/CatchPlayfield.cs
@@ -3,6 +3,7 @@
 
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Catch.Objects;
 using osu.Game.Rulesets.Catch.Objects.Drawables;
@@ -41,6 +42,8 @@ namespace osu.Game.Rulesets.Catch.UI
 
         internal CatcherArea CatcherArea { get; private set; } = null!;
 
+        public Container UnderlayElements { get; private set; } = null!;
+
         private readonly IBeatmapDifficultyInfo difficulty;
 
         public CatchPlayfield(IBeatmapDifficultyInfo difficulty)
@@ -62,6 +65,10 @@ namespace osu.Game.Rulesets.Catch.UI
 
             AddRangeInternal(new[]
             {
+                UnderlayElements = new Container
+                {
+                    RelativeSizeAxes = Axes.Both,
+                },
                 droppedObjectContainer,
                 Catcher.CreateProxiedContent(),
                 HitObjectContainer.CreateProxy(),
diff --git a/osu.Game.Rulesets.Mania/Edit/ManiaBeatSnapGrid.cs b/osu.Game.Rulesets.Mania/Edit/ManiaBeatSnapGrid.cs
index d1d5492b7a..2d4b5f718c 100644
--- a/osu.Game.Rulesets.Mania/Edit/ManiaBeatSnapGrid.cs
+++ b/osu.Game.Rulesets.Mania/Edit/ManiaBeatSnapGrid.cs
@@ -129,7 +129,7 @@ namespace osu.Game.Rulesets.Mania.Edit
                 }
 
                 Color4 colour = BindableBeatDivisor.GetColourFor(
-                    BindableBeatDivisor.GetDivisorForBeatIndex(Math.Max(1, beat), beatDivisor.Value), colours);
+                    BindableBeatDivisor.GetDivisorForBeatIndex(beat, beatDivisor.Value), colours);
 
                 foreach (var grid in grids)
                 {
diff --git a/osu.Game.Rulesets.Mania/Objects/HeadNote.cs b/osu.Game.Rulesets.Mania/Objects/HeadNote.cs
index fb5c7b4ddd..e69cc62aed 100644
--- a/osu.Game.Rulesets.Mania/Objects/HeadNote.cs
+++ b/osu.Game.Rulesets.Mania/Objects/HeadNote.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Rulesets.Mania.Objects
 {
     public class HeadNote : Note
diff --git a/osu.Game.Rulesets.Mania/Skinning/Argon/ManiaArgonSkinTransformer.cs b/osu.Game.Rulesets.Mania/Skinning/Argon/ManiaArgonSkinTransformer.cs
index 007d02400a..ddd6365c25 100644
--- a/osu.Game.Rulesets.Mania/Skinning/Argon/ManiaArgonSkinTransformer.cs
+++ b/osu.Game.Rulesets.Mania/Skinning/Argon/ManiaArgonSkinTransformer.cs
@@ -139,11 +139,11 @@ namespace osu.Game.Rulesets.Mania.Skinning.Argon
                 case 3:
                     switch (columnIndex)
                     {
-                        case 0: return colour_pink;
+                        case 0: return colour_green;
 
-                        case 1: return colour_orange;
+                        case 1: return colour_special_column;
 
-                        case 2: return colour_yellow;
+                        case 2: return colour_cyan;
 
                         default: throw new ArgumentOutOfRangeException();
                     }
@@ -185,11 +185,11 @@ namespace osu.Game.Rulesets.Mania.Skinning.Argon
 
                         case 1: return colour_orange;
 
-                        case 2: return colour_yellow;
+                        case 2: return colour_green;
 
                         case 3: return colour_cyan;
 
-                        case 4: return colour_purple;
+                        case 4: return colour_orange;
 
                         case 5: return colour_pink;
 
@@ -201,17 +201,17 @@ namespace osu.Game.Rulesets.Mania.Skinning.Argon
                     {
                         case 0: return colour_pink;
 
-                        case 1: return colour_cyan;
+                        case 1: return colour_orange;
 
                         case 2: return colour_pink;
 
                         case 3: return colour_special_column;
 
-                        case 4: return colour_green;
+                        case 4: return colour_pink;
 
-                        case 5: return colour_cyan;
+                        case 5: return colour_orange;
 
-                        case 6: return colour_green;
+                        case 6: return colour_pink;
 
                         default: throw new ArgumentOutOfRangeException();
                     }
@@ -225,9 +225,9 @@ namespace osu.Game.Rulesets.Mania.Skinning.Argon
 
                         case 2: return colour_orange;
 
-                        case 3: return colour_yellow;
+                        case 3: return colour_green;
 
-                        case 4: return colour_yellow;
+                        case 4: return colour_cyan;
 
                         case 5: return colour_orange;
 
@@ -273,9 +273,9 @@ namespace osu.Game.Rulesets.Mania.Skinning.Argon
 
                         case 3: return colour_yellow;
 
-                        case 4: return colour_cyan;
+                        case 4: return colour_green;
 
-                        case 5: return colour_green;
+                        case 5: return colour_cyan;
 
                         case 6: return colour_yellow;
 
diff --git a/osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/SliderPosition.cs b/osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/SliderPosition.cs
index 92071d4a57..616bb17e05 100644
--- a/osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/SliderPosition.cs
+++ b/osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/SliderPosition.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
 {
     public enum SliderPosition
diff --git a/osu.Game.Rulesets.Osu/Objects/Drawables/IRequireTracking.cs b/osu.Game.Rulesets.Osu/Objects/Drawables/IRequireTracking.cs
index 55de5a0e8d..b1815b23c9 100644
--- a/osu.Game.Rulesets.Osu/Objects/Drawables/IRequireTracking.cs
+++ b/osu.Game.Rulesets.Osu/Objects/Drawables/IRequireTracking.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Rulesets.Osu.Objects.Drawables
 {
     public interface IRequireTracking
diff --git a/osu.Game.Rulesets.Osu/Objects/ISliderProgress.cs b/osu.Game.Rulesets.Osu/Objects/ISliderProgress.cs
index eddd251bda..7594f7c2e0 100644
--- a/osu.Game.Rulesets.Osu/Objects/ISliderProgress.cs
+++ b/osu.Game.Rulesets.Osu/Objects/ISliderProgress.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Rulesets.Osu.Objects
 {
     public interface ISliderProgress
diff --git a/osu.Game.Rulesets.Taiko/Objects/HitType.cs b/osu.Game.Rulesets.Taiko/Objects/HitType.cs
index eae7fa683a..17b3fdbd04 100644
--- a/osu.Game.Rulesets.Taiko/Objects/HitType.cs
+++ b/osu.Game.Rulesets.Taiko/Objects/HitType.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Rulesets.Taiko.Objects
 {
     /// <summary>
diff --git a/osu.Game.Tests/Rulesets/TestSceneBrokenRulesetHandling.cs b/osu.Game.Tests/Rulesets/TestSceneBrokenRulesetHandling.cs
index c3a6b7c474..dac6beea65 100644
--- a/osu.Game.Tests/Rulesets/TestSceneBrokenRulesetHandling.cs
+++ b/osu.Game.Tests/Rulesets/TestSceneBrokenRulesetHandling.cs
@@ -73,7 +73,5 @@ namespace osu.Game.Tests.Rulesets
             public override IBeatmapConverter CreateBeatmapConverter(IBeatmap beatmap) => null;
             public override DifficultyCalculator CreateDifficultyCalculator(IWorkingBeatmap beatmap) => null;
         }
-
-#nullable enable
     }
 }
diff --git a/osu.Game.Tests/Visual/Editing/TestSceneEditorTestGameplay.cs b/osu.Game.Tests/Visual/Editing/TestSceneEditorTestGameplay.cs
index 2250868a39..007716bd6c 100644
--- a/osu.Game.Tests/Visual/Editing/TestSceneEditorTestGameplay.cs
+++ b/osu.Game.Tests/Visual/Editing/TestSceneEditorTestGameplay.cs
@@ -209,10 +209,14 @@ namespace osu.Game.Tests.Visual.Editing
         public override void TearDownSteps()
         {
             base.TearDownSteps();
-            AddStep("delete imported", () =>
+            AddStep("delete imported", () => Realm.Write(r =>
             {
-                beatmaps.Delete(importedBeatmapSet);
-            });
+                // delete from realm directly rather than via `BeatmapManager` to avoid cross-test pollution
+                // (`BeatmapManager.Delete()` uses soft deletion, which can lead to beatmap reuse between test cases).
+                r.RemoveAll<BeatmapMetadata>();
+                r.RemoveAll<BeatmapInfo>();
+                r.RemoveAll<BeatmapSetInfo>();
+            }));
         }
     }
 }
diff --git a/osu.Game.Tests/Visual/Navigation/TestSceneBeatmapEditorNavigation.cs b/osu.Game.Tests/Visual/Navigation/TestSceneBeatmapEditorNavigation.cs
index 1b2bb57b84..5483be5676 100644
--- a/osu.Game.Tests/Visual/Navigation/TestSceneBeatmapEditorNavigation.cs
+++ b/osu.Game.Tests/Visual/Navigation/TestSceneBeatmapEditorNavigation.cs
@@ -40,7 +40,7 @@ namespace osu.Game.Tests.Visual.Navigation
 
             AddStep("open editor", () => ((PlaySongSelect)Game.ScreenStack.CurrentScreen).Edit(beatmapSet.Beatmaps.First(beatmap => beatmap.Ruleset.OnlineID == 0)));
             AddUntilStep("wait for editor open", () => Game.ScreenStack.CurrentScreen is Editor editor && editor.ReadyForUse);
-            AddStep("test gameplay", () => ((Editor)Game.ScreenStack.CurrentScreen).TestGameplay());
+            AddStep("test gameplay", () => getEditor().TestGameplay());
 
             AddUntilStep("wait for player", () =>
             {
@@ -141,6 +141,37 @@ namespace osu.Game.Tests.Visual.Navigation
             AddUntilStep("wait for editor exit", () => Game.ScreenStack.CurrentScreen is not Editor);
         }
 
-        private EditorBeatmap getEditorBeatmap() => ((Editor)Game.ScreenStack.CurrentScreen).ChildrenOfType<EditorBeatmap>().Single();
+        [Test]
+        public void TestLastTimestampRememberedOnExit()
+        {
+            BeatmapSetInfo beatmapSet = null!;
+
+            AddStep("import test beatmap", () => Game.BeatmapManager.Import(TestResources.GetTestBeatmapForImport()).WaitSafely());
+            AddStep("retrieve beatmap", () => beatmapSet = Game.BeatmapManager.QueryBeatmapSet(set => !set.Protected).AsNonNull().Value.Detach());
+
+            AddStep("present beatmap", () => Game.PresentBeatmap(beatmapSet));
+            AddUntilStep("wait for song select",
+                () => Game.Beatmap.Value.BeatmapSetInfo.Equals(beatmapSet)
+                      && Game.ScreenStack.CurrentScreen is PlaySongSelect songSelect
+                      && songSelect.IsLoaded);
+
+            AddStep("open editor", () => ((PlaySongSelect)Game.ScreenStack.CurrentScreen).Edit(beatmapSet.Beatmaps.First(beatmap => beatmap.Ruleset.OnlineID == 0)));
+            AddUntilStep("wait for editor open", () => Game.ScreenStack.CurrentScreen is Editor editor && editor.ReadyForUse);
+
+            AddStep("seek to arbitrary time", () => getEditor().ChildrenOfType<EditorClock>().First().Seek(1234));
+            AddUntilStep("time is correct", () => getEditor().ChildrenOfType<EditorClock>().First().CurrentTime, () => Is.EqualTo(1234));
+
+            AddStep("exit editor", () => InputManager.Key(Key.Escape));
+            AddUntilStep("wait for editor exit", () => Game.ScreenStack.CurrentScreen is not Editor);
+
+            AddStep("open editor", () => ((PlaySongSelect)Game.ScreenStack.CurrentScreen).Edit());
+
+            AddUntilStep("wait for editor open", () => Game.ScreenStack.CurrentScreen is Editor editor && editor.ReadyForUse);
+            AddUntilStep("time is correct", () => getEditor().ChildrenOfType<EditorClock>().First().CurrentTime, () => Is.EqualTo(1234));
+        }
+
+        private EditorBeatmap getEditorBeatmap() => getEditor().ChildrenOfType<EditorBeatmap>().Single();
+
+        private Editor getEditor() => (Editor)Game.ScreenStack.CurrentScreen;
     }
 }
diff --git a/osu.Game.Tournament/IPC/TourneyState.cs b/osu.Game.Tournament/IPC/TourneyState.cs
index 2c7253dc10..ef1c612a53 100644
--- a/osu.Game.Tournament/IPC/TourneyState.cs
+++ b/osu.Game.Tournament/IPC/TourneyState.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Tournament.IPC
 {
     public enum TourneyState
diff --git a/osu.Game.Tournament/Screens/Ladder/Components/ConditionalTournamentMatch.cs b/osu.Game.Tournament/Screens/Ladder/Components/ConditionalTournamentMatch.cs
index 04155fcb89..16224a7fb4 100644
--- a/osu.Game.Tournament/Screens/Ladder/Components/ConditionalTournamentMatch.cs
+++ b/osu.Game.Tournament/Screens/Ladder/Components/ConditionalTournamentMatch.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 using osu.Game.Tournament.Models;
 
 namespace osu.Game.Tournament.Screens.Ladder.Components
diff --git a/osu.Game/Beatmaps/BeatmapInfo.cs b/osu.Game/Beatmaps/BeatmapInfo.cs
index 393feff087..5019d64276 100644
--- a/osu.Game/Beatmaps/BeatmapInfo.cs
+++ b/osu.Game/Beatmaps/BeatmapInfo.cs
@@ -171,6 +171,11 @@ namespace osu.Game.Beatmaps
 
         public double TimelineZoom { get; set; } = 1.0;
 
+        /// <summary>
+        /// The time in milliseconds when last exiting the editor with this beatmap loaded.
+        /// </summary>
+        public double? EditorTimestamp { get; set; }
+
         [Ignored]
         public CountdownType Countdown { get; set; } = CountdownType.Normal;
 
diff --git a/osu.Game/Beatmaps/DifficultyRating.cs b/osu.Game/Beatmaps/DifficultyRating.cs
index 478c0e36df..f0ee0ad705 100644
--- a/osu.Game/Beatmaps/DifficultyRating.cs
+++ b/osu.Game/Beatmaps/DifficultyRating.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Beatmaps
 {
     public enum DifficultyRating
diff --git a/osu.Game/Beatmaps/Drawables/Cards/BeatmapCardSize.cs b/osu.Game/Beatmaps/Drawables/Cards/BeatmapCardSize.cs
index 1f6538a890..098265506d 100644
--- a/osu.Game/Beatmaps/Drawables/Cards/BeatmapCardSize.cs
+++ b/osu.Game/Beatmaps/Drawables/Cards/BeatmapCardSize.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Beatmaps.Drawables.Cards
 {
     /// <summary>
diff --git a/osu.Game/Beatmaps/Legacy/LegacyOrigins.cs b/osu.Game/Beatmaps/Legacy/LegacyOrigins.cs
index 62b0edc384..31f67d6dfd 100644
--- a/osu.Game/Beatmaps/Legacy/LegacyOrigins.cs
+++ b/osu.Game/Beatmaps/Legacy/LegacyOrigins.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Beatmaps.Legacy
 {
     internal enum LegacyOrigins
diff --git a/osu.Game/Configuration/IntroSequence.cs b/osu.Game/Configuration/IntroSequence.cs
index 8327ea2f57..5672c44bbe 100644
--- a/osu.Game/Configuration/IntroSequence.cs
+++ b/osu.Game/Configuration/IntroSequence.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Configuration
 {
     public enum IntroSequence
diff --git a/osu.Game/Configuration/ReleaseStream.cs b/osu.Game/Configuration/ReleaseStream.cs
index 9cdd91bfd0..ed0bee1dd8 100644
--- a/osu.Game/Configuration/ReleaseStream.cs
+++ b/osu.Game/Configuration/ReleaseStream.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Configuration
 {
     public enum ReleaseStream
diff --git a/osu.Game/Configuration/ToolbarClockDisplayMode.cs b/osu.Game/Configuration/ToolbarClockDisplayMode.cs
index 682e221ef8..2f42f7a9b5 100644
--- a/osu.Game/Configuration/ToolbarClockDisplayMode.cs
+++ b/osu.Game/Configuration/ToolbarClockDisplayMode.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Configuration
 {
     public enum ToolbarClockDisplayMode
diff --git a/osu.Game/Database/ISoftDelete.cs b/osu.Game/Database/ISoftDelete.cs
index b07c8db2de..afa42c2002 100644
--- a/osu.Game/Database/ISoftDelete.cs
+++ b/osu.Game/Database/ISoftDelete.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Database
 {
     /// <summary>
diff --git a/osu.Game/Database/RealmAccess.cs b/osu.Game/Database/RealmAccess.cs
index 94108531e8..f4c6c802f1 100644
--- a/osu.Game/Database/RealmAccess.cs
+++ b/osu.Game/Database/RealmAccess.cs
@@ -71,8 +71,9 @@ namespace osu.Game.Database
         /// 24   2022-08-22    Added MaximumStatistics to ScoreInfo.
         /// 25   2022-09-18    Remove skins to add with new naming.
         /// 26   2023-02-05    Added BeatmapHash to ScoreInfo.
+        /// 27   2023-06-06    Added EditorTimestamp to BeatmapInfo.
         /// </summary>
-        private const int schema_version = 26;
+        private const int schema_version = 27;
 
         /// <summary>
         /// Lock object which is held during <see cref="BlockAllOperations"/> sections, blocking realm retrieval during blocking periods.
diff --git a/osu.Game/Graphics/UserInterface/MenuItemType.cs b/osu.Game/Graphics/UserInterface/MenuItemType.cs
index 1eb45d6b1c..0269f2cb57 100644
--- a/osu.Game/Graphics/UserInterface/MenuItemType.cs
+++ b/osu.Game/Graphics/UserInterface/MenuItemType.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Graphics.UserInterface
 {
     public enum MenuItemType
diff --git a/osu.Game/Graphics/UserInterface/SelectionState.cs b/osu.Game/Graphics/UserInterface/SelectionState.cs
index edabf0547b..c85b2ad3ab 100644
--- a/osu.Game/Graphics/UserInterface/SelectionState.cs
+++ b/osu.Game/Graphics/UserInterface/SelectionState.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Graphics.UserInterface
 {
     public enum SelectionState
diff --git a/osu.Game/Graphics/UserInterface/TernaryState.cs b/osu.Game/Graphics/UserInterface/TernaryState.cs
index effbe624c3..d4de28044f 100644
--- a/osu.Game/Graphics/UserInterface/TernaryState.cs
+++ b/osu.Game/Graphics/UserInterface/TernaryState.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Graphics.UserInterface
 {
     /// <summary>
diff --git a/osu.Game/Online/API/APIRequestCompletionState.cs b/osu.Game/Online/API/APIRequestCompletionState.cs
index 52eb669a7d..84c9974dd8 100644
--- a/osu.Game/Online/API/APIRequestCompletionState.cs
+++ b/osu.Game/Online/API/APIRequestCompletionState.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Online.API
 {
     public enum APIRequestCompletionState
diff --git a/osu.Game/Online/Chat/ChannelType.cs b/osu.Game/Online/Chat/ChannelType.cs
index a864e20830..bd628e90c4 100644
--- a/osu.Game/Online/Chat/ChannelType.cs
+++ b/osu.Game/Online/Chat/ChannelType.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Online.Chat
 {
     public enum ChannelType
diff --git a/osu.Game/Online/Leaderboards/LeaderboardState.cs b/osu.Game/Online/Leaderboards/LeaderboardState.cs
index abc0ef4f19..6b07500a98 100644
--- a/osu.Game/Online/Leaderboards/LeaderboardState.cs
+++ b/osu.Game/Online/Leaderboards/LeaderboardState.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Online.Leaderboards
 {
     public enum LeaderboardState
diff --git a/osu.Game/Online/Multiplayer/ForceGameplayStartCountdown.cs b/osu.Game/Online/Multiplayer/ForceGameplayStartCountdown.cs
index bbfc5a02c6..c497601e37 100644
--- a/osu.Game/Online/Multiplayer/ForceGameplayStartCountdown.cs
+++ b/osu.Game/Online/Multiplayer/ForceGameplayStartCountdown.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 using MessagePack;
 
 namespace osu.Game.Online.Multiplayer
diff --git a/osu.Game/Online/Multiplayer/IMultiplayerServer.cs b/osu.Game/Online/Multiplayer/IMultiplayerServer.cs
index cc7a474ce7..d3a070af6d 100644
--- a/osu.Game/Online/Multiplayer/IMultiplayerServer.cs
+++ b/osu.Game/Online/Multiplayer/IMultiplayerServer.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Online.Multiplayer
 {
     /// <summary>
diff --git a/osu.Game/Online/Multiplayer/MultiplayerUserState.cs b/osu.Game/Online/Multiplayer/MultiplayerUserState.cs
index 0f7dc6b8cd..d1369a7970 100644
--- a/osu.Game/Online/Multiplayer/MultiplayerUserState.cs
+++ b/osu.Game/Online/Multiplayer/MultiplayerUserState.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Online.Multiplayer
 {
     public enum MultiplayerUserState
diff --git a/osu.Game/Online/Spectator/SpectatedUserState.cs b/osu.Game/Online/Spectator/SpectatedUserState.cs
index edf0859a33..0f0a3068b8 100644
--- a/osu.Game/Online/Spectator/SpectatedUserState.cs
+++ b/osu.Game/Online/Spectator/SpectatedUserState.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Online.Spectator
 {
     public enum SpectatedUserState
diff --git a/osu.Game/Overlays/Chat/ChatLine.cs b/osu.Game/Overlays/Chat/ChatLine.cs
index 2f4c175ac4..c85206d5f7 100644
--- a/osu.Game/Overlays/Chat/ChatLine.cs
+++ b/osu.Game/Overlays/Chat/ChatLine.cs
@@ -56,11 +56,11 @@ namespace osu.Game.Overlays.Chat
         [Resolved]
         private OverlayColourProvider? colourProvider { get; set; }
 
-        private readonly OsuSpriteText drawableTimestamp;
+        private OsuSpriteText drawableTimestamp = null!;
 
-        private readonly DrawableChatUsername drawableUsername;
+        private DrawableChatUsername drawableUsername = null!;
 
-        private readonly LinkFlowContainer drawableContentFlow;
+        private LinkFlowContainer drawableContentFlow = null!;
 
         private readonly Bindable<bool> prefer24HourTime = new Bindable<bool>();
 
@@ -69,8 +69,16 @@ namespace osu.Game.Overlays.Chat
         public ChatLine(Message message)
         {
             Message = message;
+
             RelativeSizeAxes = Axes.X;
             AutoSizeAxes = Axes.Y;
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(OsuConfigManager configManager)
+        {
+            configManager.BindWith(OsuSetting.Prefer24HourTime, prefer24HourTime);
+            prefer24HourTime.BindValueChanged(_ => updateTimestamp());
 
             InternalChild = new GridContainer
             {
@@ -103,7 +111,6 @@ namespace osu.Game.Overlays.Chat
                             Origin = Anchor.TopRight,
                             Anchor = Anchor.TopRight,
                             Margin = new MarginPadding { Horizontal = Spacing },
-                            ReportRequested = this.ShowPopover,
                         },
                         drawableContentFlow = new LinkFlowContainer(styleMessageContent)
                         {
@@ -115,13 +122,6 @@ namespace osu.Game.Overlays.Chat
             };
         }
 
-        [BackgroundDependencyLoader]
-        private void load(OsuConfigManager configManager)
-        {
-            configManager.BindWith(OsuSetting.Prefer24HourTime, prefer24HourTime);
-            prefer24HourTime.BindValueChanged(_ => updateTimestamp());
-        }
-
         protected override void LoadComplete()
         {
             base.LoadComplete();
@@ -130,6 +130,17 @@ namespace osu.Game.Overlays.Chat
 
             updateMessageContent();
             FinishTransforms(true);
+
+            if (this.FindClosestParent<PopoverContainer>() != null)
+            {
+                // This guards against cases like in-game chat where there's no available popover container.
+                // There may be a future where a global one becomes available, at which point this code may be unnecessary.
+                //
+                // See:
+                // https://github.com/ppy/osu/pull/23698
+                // https://github.com/ppy/osu/pull/14554
+                drawableUsername.ReportRequested = this.ShowPopover;
+            }
         }
 
         public Popover GetPopover() => new ReportChatPopover(message);
diff --git a/osu.Game/Overlays/OverlayActivation.cs b/osu.Game/Overlays/OverlayActivation.cs
index 354153734e..68d7ee8ea9 100644
--- a/osu.Game/Overlays/OverlayActivation.cs
+++ b/osu.Game/Overlays/OverlayActivation.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Overlays
 {
     public enum OverlayActivation
diff --git a/osu.Game/Overlays/SortDirection.cs b/osu.Game/Overlays/SortDirection.cs
index 98ac31103f..3af9614972 100644
--- a/osu.Game/Overlays/SortDirection.cs
+++ b/osu.Game/Overlays/SortDirection.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Overlays
 {
     public enum SortDirection
diff --git a/osu.Game/Rulesets/Configuration/IRulesetConfigManager.cs b/osu.Game/Rulesets/Configuration/IRulesetConfigManager.cs
index af315bfb28..5a3ad5e786 100644
--- a/osu.Game/Rulesets/Configuration/IRulesetConfigManager.cs
+++ b/osu.Game/Rulesets/Configuration/IRulesetConfigManager.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 using System;
 using osu.Framework.Configuration.Tracking;
 
diff --git a/osu.Game/Rulesets/Objects/Drawables/ArmedState.cs b/osu.Game/Rulesets/Objects/Drawables/ArmedState.cs
index 4faf0920d1..b2d9f50602 100644
--- a/osu.Game/Rulesets/Objects/Drawables/ArmedState.cs
+++ b/osu.Game/Rulesets/Objects/Drawables/ArmedState.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Rulesets.Objects.Drawables
 {
     public enum ArmedState
diff --git a/osu.Game/Rulesets/Objects/IBarLine.cs b/osu.Game/Rulesets/Objects/IBarLine.cs
index 8cdead6776..14df80e3b9 100644
--- a/osu.Game/Rulesets/Objects/IBarLine.cs
+++ b/osu.Game/Rulesets/Objects/IBarLine.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Rulesets.Objects
 {
     /// <summary>
diff --git a/osu.Game/Rulesets/Objects/Legacy/ConvertHitObjectParser.cs b/osu.Game/Rulesets/Objects/Legacy/ConvertHitObjectParser.cs
index d9738ecd0a..8eda2a8f61 100644
--- a/osu.Game/Rulesets/Objects/Legacy/ConvertHitObjectParser.cs
+++ b/osu.Game/Rulesets/Objects/Legacy/ConvertHitObjectParser.cs
@@ -586,7 +586,5 @@ namespace osu.Game.Rulesets.Objects.Legacy
 
             public override int GetHashCode() => HashCode.Combine(base.GetHashCode(), Filename);
         }
-
-#nullable disable
     }
 }
diff --git a/osu.Game/Rulesets/Objects/Legacy/Mania/ConvertHit.cs b/osu.Game/Rulesets/Objects/Legacy/Mania/ConvertHit.cs
index 639cacb128..0b69817c13 100644
--- a/osu.Game/Rulesets/Objects/Legacy/Mania/ConvertHit.cs
+++ b/osu.Game/Rulesets/Objects/Legacy/Mania/ConvertHit.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 using osu.Game.Rulesets.Objects.Types;
 
 namespace osu.Game.Rulesets.Objects.Legacy.Mania
diff --git a/osu.Game/Rulesets/Objects/Legacy/Mania/ConvertSlider.cs b/osu.Game/Rulesets/Objects/Legacy/Mania/ConvertSlider.cs
index 330ebf72c7..84cde5fa95 100644
--- a/osu.Game/Rulesets/Objects/Legacy/Mania/ConvertSlider.cs
+++ b/osu.Game/Rulesets/Objects/Legacy/Mania/ConvertSlider.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 using osu.Game.Rulesets.Objects.Types;
 
 namespace osu.Game.Rulesets.Objects.Legacy.Mania
diff --git a/osu.Game/Rulesets/Objects/Legacy/Taiko/ConvertHit.cs b/osu.Game/Rulesets/Objects/Legacy/Taiko/ConvertHit.cs
index 980d37ccd5..cb5178ce48 100644
--- a/osu.Game/Rulesets/Objects/Legacy/Taiko/ConvertHit.cs
+++ b/osu.Game/Rulesets/Objects/Legacy/Taiko/ConvertHit.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Rulesets.Objects.Legacy.Taiko
 {
     /// <summary>
diff --git a/osu.Game/Rulesets/Objects/Legacy/Taiko/ConvertSlider.cs b/osu.Game/Rulesets/Objects/Legacy/Taiko/ConvertSlider.cs
index a391c8cb43..821554f7ee 100644
--- a/osu.Game/Rulesets/Objects/Legacy/Taiko/ConvertSlider.cs
+++ b/osu.Game/Rulesets/Objects/Legacy/Taiko/ConvertSlider.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Rulesets.Objects.Legacy.Taiko
 {
     /// <summary>
diff --git a/osu.Game/Rulesets/Objects/Types/IHasColumn.cs b/osu.Game/Rulesets/Objects/Types/IHasColumn.cs
index 3978a7e765..dc07cfbb6a 100644
--- a/osu.Game/Rulesets/Objects/Types/IHasColumn.cs
+++ b/osu.Game/Rulesets/Objects/Types/IHasColumn.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Rulesets.Objects.Types
 {
     /// <summary>
diff --git a/osu.Game/Rulesets/Objects/Types/IHasCombo.cs b/osu.Game/Rulesets/Objects/Types/IHasCombo.cs
index d02b97a3e4..d1a4683a1d 100644
--- a/osu.Game/Rulesets/Objects/Types/IHasCombo.cs
+++ b/osu.Game/Rulesets/Objects/Types/IHasCombo.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Rulesets.Objects.Types
 {
     /// <summary>
diff --git a/osu.Game/Rulesets/Objects/Types/IHasDistance.cs b/osu.Game/Rulesets/Objects/Types/IHasDistance.cs
index 549abc046a..b497ca5da3 100644
--- a/osu.Game/Rulesets/Objects/Types/IHasDistance.cs
+++ b/osu.Game/Rulesets/Objects/Types/IHasDistance.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Rulesets.Objects.Types
 {
     /// <summary>
diff --git a/osu.Game/Rulesets/Objects/Types/IHasDuration.cs b/osu.Game/Rulesets/Objects/Types/IHasDuration.cs
index 06ed8eba76..ca734da5ad 100644
--- a/osu.Game/Rulesets/Objects/Types/IHasDuration.cs
+++ b/osu.Game/Rulesets/Objects/Types/IHasDuration.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Rulesets.Objects.Types
 {
     /// <summary>
diff --git a/osu.Game/Rulesets/Objects/Types/IHasHold.cs b/osu.Game/Rulesets/Objects/Types/IHasHold.cs
index 91b05dc3fd..469b8b7892 100644
--- a/osu.Game/Rulesets/Objects/Types/IHasHold.cs
+++ b/osu.Game/Rulesets/Objects/Types/IHasHold.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Rulesets.Objects.Types
 {
     /// <summary>
diff --git a/osu.Game/Rulesets/Objects/Types/IHasLegacyLastTickOffset.cs b/osu.Game/Rulesets/Objects/Types/IHasLegacyLastTickOffset.cs
index dfc526383a..caf22c3023 100644
--- a/osu.Game/Rulesets/Objects/Types/IHasLegacyLastTickOffset.cs
+++ b/osu.Game/Rulesets/Objects/Types/IHasLegacyLastTickOffset.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Rulesets.Objects.Types
 {
     /// <summary>
diff --git a/osu.Game/Rulesets/Objects/Types/IHasXPosition.cs b/osu.Game/Rulesets/Objects/Types/IHasXPosition.cs
index f688c783e1..7e55b21050 100644
--- a/osu.Game/Rulesets/Objects/Types/IHasXPosition.cs
+++ b/osu.Game/Rulesets/Objects/Types/IHasXPosition.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Rulesets.Objects.Types
 {
     /// <summary>
diff --git a/osu.Game/Rulesets/Objects/Types/IHasYPosition.cs b/osu.Game/Rulesets/Objects/Types/IHasYPosition.cs
index 3c0cc595fb..d2561b10a7 100644
--- a/osu.Game/Rulesets/Objects/Types/IHasYPosition.cs
+++ b/osu.Game/Rulesets/Objects/Types/IHasYPosition.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Rulesets.Objects.Types
 {
     /// <summary>
diff --git a/osu.Game/Rulesets/Objects/Types/PathType.cs b/osu.Game/Rulesets/Objects/Types/PathType.cs
index 266a3de6ec..923ce9eba4 100644
--- a/osu.Game/Rulesets/Objects/Types/PathType.cs
+++ b/osu.Game/Rulesets/Objects/Types/PathType.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Rulesets.Objects.Types
 {
     public enum PathType
diff --git a/osu.Game/Rulesets/UI/Scrolling/ScrollingDirection.cs b/osu.Game/Rulesets/UI/Scrolling/ScrollingDirection.cs
index 58bb80accd..81e1a6c916 100644
--- a/osu.Game/Rulesets/UI/Scrolling/ScrollingDirection.cs
+++ b/osu.Game/Rulesets/UI/Scrolling/ScrollingDirection.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Rulesets.UI.Scrolling
 {
     public enum ScrollingDirection
diff --git a/osu.Game/Screens/Edit/Compose/Components/BeatDivisorType.cs b/osu.Game/Screens/Edit/Compose/Components/BeatDivisorType.cs
index ebdb030e76..4a25144881 100644
--- a/osu.Game/Screens/Edit/Compose/Components/BeatDivisorType.cs
+++ b/osu.Game/Screens/Edit/Compose/Components/BeatDivisorType.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Screens.Edit.Compose.Components
 {
     public enum BeatDivisorType
diff --git a/osu.Game/Screens/Edit/Editor.cs b/osu.Game/Screens/Edit/Editor.cs
index b8fa7f6579..bb052b1d22 100644
--- a/osu.Game/Screens/Edit/Editor.cs
+++ b/osu.Game/Screens/Edit/Editor.cs
@@ -28,6 +28,7 @@ using osu.Game.Audio;
 using osu.Game.Beatmaps;
 using osu.Game.Beatmaps.ControlPoints;
 using osu.Game.Configuration;
+using osu.Game.Database;
 using osu.Game.Graphics.Cursor;
 using osu.Game.Graphics.UserInterface;
 using osu.Game.Input.Bindings;
@@ -92,6 +93,9 @@ namespace osu.Game.Screens.Edit
         [Resolved(canBeNull: true)]
         private INotificationOverlay notifications { get; set; }
 
+        [Resolved]
+        private RealmAccess realm { get; set; }
+
         public readonly Bindable<EditorScreenMode> Mode = new Bindable<EditorScreenMode>();
 
         public IBindable<bool> SamplePlaybackDisabled => samplePlaybackDisabled;
@@ -700,6 +704,13 @@ namespace osu.Game.Screens.Edit
                 }
             }
 
+            realm.Write(r =>
+            {
+                var beatmap = r.Find<BeatmapInfo>(editorBeatmap.BeatmapInfo.ID);
+                if (beatmap != null)
+                    beatmap.EditorTimestamp = clock.CurrentTime;
+            });
+
             ApplyToBackground(b =>
             {
                 b.DimWhenUserSettingsIgnored.Value = 0;
@@ -833,7 +844,11 @@ namespace osu.Game.Screens.Edit
             {
                 double targetTime = 0;
 
-                if (Beatmap.Value.Beatmap.HitObjects.Count > 0)
+                if (editorBeatmap.BeatmapInfo.EditorTimestamp != null)
+                {
+                    targetTime = editorBeatmap.BeatmapInfo.EditorTimestamp.Value;
+                }
+                else if (Beatmap.Value.Beatmap.HitObjects.Count > 0)
                 {
                     // seek to one beat length before the first hitobject
                     targetTime = Beatmap.Value.Beatmap.HitObjects[0].StartTime;
diff --git a/osu.Game/Screens/OnlinePlay/Multiplayer/Match/Playlist/MultiplayerPlaylistDisplayMode.cs b/osu.Game/Screens/OnlinePlay/Multiplayer/Match/Playlist/MultiplayerPlaylistDisplayMode.cs
index 1672f98637..cc3dca6a34 100644
--- a/osu.Game/Screens/OnlinePlay/Multiplayer/Match/Playlist/MultiplayerPlaylistDisplayMode.cs
+++ b/osu.Game/Screens/OnlinePlay/Multiplayer/Match/Playlist/MultiplayerPlaylistDisplayMode.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Screens.OnlinePlay.Multiplayer.Match.Playlist
 {
     /// <summary>
diff --git a/osu.Game/Screens/OnlinePlay/Multiplayer/Spectate/MasterClockState.cs b/osu.Game/Screens/OnlinePlay/Multiplayer/Spectate/MasterClockState.cs
index 92dbde9f08..8982d1669d 100644
--- a/osu.Game/Screens/OnlinePlay/Multiplayer/Spectate/MasterClockState.cs
+++ b/osu.Game/Screens/OnlinePlay/Multiplayer/Spectate/MasterClockState.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Screens.OnlinePlay.Multiplayer.Spectate
 {
     public enum MasterClockState
diff --git a/osu.Game/Screens/Ranking/PanelState.cs b/osu.Game/Screens/Ranking/PanelState.cs
index 3af74fe0f3..94e2c7cef4 100644
--- a/osu.Game/Screens/Ranking/PanelState.cs
+++ b/osu.Game/Screens/Ranking/PanelState.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Screens.Ranking
 {
     public enum PanelState
diff --git a/osu.Game/Screens/ScorePresentType.cs b/osu.Game/Screens/ScorePresentType.cs
index 24105467f1..3216f92091 100644
--- a/osu.Game/Screens/ScorePresentType.cs
+++ b/osu.Game/Screens/ScorePresentType.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Screens
 {
     public enum ScorePresentType
diff --git a/osu.Game/Screens/Select/Filter/Operator.cs b/osu.Game/Screens/Select/Filter/Operator.cs
index a6a53f0c3e..706daf631f 100644
--- a/osu.Game/Screens/Select/Filter/Operator.cs
+++ b/osu.Game/Screens/Select/Filter/Operator.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 namespace osu.Game.Screens.Select.Filter
 {
     /// <summary>