Don't update gameplay loop while paused

osu.Game/Rulesets/UI/FrameStabilityContainer.cs

@@ -36,7 +36,10 @@ namespace osu.Game.Rulesets.UI
         private void load(GameplayClock clock)
         {
             if (clock != null)
+            {
                 parentGameplayClock = clock;
+                gameplayClock.IsPaused.BindTo(clock.IsPaused);
+            }
         }
 
         protected override void LoadComplete()
@@ -68,7 +71,7 @@ namespace osu.Game.Rulesets.UI
         public override bool UpdateSubTree()
         {
             requireMoreUpdateLoops = true;
-            validState = true;
+            validState = !gameplayClock.IsPaused.Value;
 
             int loops = 0;
 

osu.Game/Screens/Play/GameplayClock.cs

@@ -1,6 +1,7 @@
 // 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 osu.Framework.Bindables;
 using osu.Framework.Timing;
 
 namespace osu.Game.Screens.Play
@@ -17,6 +18,8 @@ namespace osu.Game.Screens.Play
     {
         private readonly IFrameBasedClock underlyingClock;
 
+        public readonly BindableBool IsPaused = new BindableBool();
+
         public GameplayClock(IFrameBasedClock underlyingClock)
         {
             this.underlyingClock = underlyingClock;

osu.Game/Screens/Play/GameplayClockContainer.cs

@@ -79,6 +79,8 @@ namespace osu.Game.Screens.Play
 
             // the clock to be exposed via DI to children.
             GameplayClock = new GameplayClock(offsetClock);
+
+            GameplayClock.IsPaused.BindTo(IsPaused);
         }
 
         [BackgroundDependencyLoader]