Avoid saving a state when clearly not dirty

osu.Game/Screens/Edit/Editor.cs

@@ -573,6 +573,9 @@ namespace osu.Game.Screens.Edit
             return true;
         }
 
+        [CanBeNull]
+        internal event Action Saved;
+
         /// <summary>
         /// Saves the currently edited beatmap.
         /// </summary>
@@ -601,6 +604,7 @@ namespace osu.Game.Screens.Edit
             isNewBeatmap = false;
             updateLastSavedHash();
             onScreenDisplay?.Display(new BeatmapEditorToast(ToastStrings.BeatmapSaved, editorBeatmap.BeatmapInfo.GetDisplayTitle()));
+            Saved?.Invoke();
             return true;
         }
 

osu.Game/Screens/Edit/Setup/MetadataSection.cs

@@ -25,8 +25,13 @@ namespace osu.Game.Screens.Edit.Setup
         private FormTextBox sourceTextBox = null!;
         private FormTextBox tagsTextBox = null!;
 
+        private bool dirty = false;
+
         public override LocalisableString Title => EditorSetupStrings.MetadataHeader;
 
+        [Resolved]
+        private Editor editor { get; set; }
+
         [BackgroundDependencyLoader]
         private void load(SetupScreen? setupScreen)
         {
@@ -73,11 +78,13 @@ namespace osu.Game.Screens.Edit.Setup
                 item.Current.BindValueChanged(_ => applyMetadata());
                 item.OnCommit += (_, newText) =>
                 {
-                    if (newText)
+                    if (newText && dirty)
                         Beatmap.SaveState();
                 };
             }
 
+            editor.Saved += () => dirty = false;
+
             updateReadOnlyState();
         }
 
@@ -124,6 +131,8 @@ namespace osu.Game.Screens.Edit.Setup
             Beatmap.BeatmapInfo.DifficultyName = difficultyTextBox.Current.Value;
             Beatmap.Metadata.Source = sourceTextBox.Current.Value;
             Beatmap.Metadata.Tags = tagsTextBox.Current.Value;
+
+            dirty = true;
         }
 
         private partial class FormRomanisedTextBox : FormTextBox