Merge pull request #22261 from peppy/fix-bad-operation

Fix song select potentially operating on `Carousel` before it is fully loaded

osu.Game/Screens/Select/BeatmapCarousel.cs

@@ -596,6 +596,9 @@ namespace osu.Game.Screens.Select
 
         public void FlushPendingFilterOperations()
         {
+            if (!IsLoaded)
+                return;
+
             if (PendingFilter?.Completed == false)
             {
                 applyActiveCriteria(false);

osu.Game/Screens/Select/SongSelect.cs

@@ -863,6 +863,7 @@ namespace osu.Game.Screens.Select
             // if we have a pending filter operation, we want to run it now.
             // it could change selection (ie. if the ruleset has been changed).
             Carousel.FlushPendingFilterOperations();
+
             return true;
         }