Fix carousel filtering twice on entering song select

osu.Game/Screens/SelectV2/BeatmapCarousel.cs

@@ -7,6 +7,7 @@ using System.Collections.Specialized;
 using System.Diagnostics;
 using System.Linq;
 using System.Threading;
+using System.Threading.Tasks;
 using osu.Framework.Allocation;
 using osu.Framework.Audio;
 using osu.Framework.Audio.Sample;
@@ -49,6 +50,8 @@ namespace osu.Game.Screens.SelectV2
         private readonly BeatmapCarouselFilterMatching matching;
         private readonly BeatmapCarouselFilterGrouping grouping;
 
+        private bool waitingForInitialCriteria;
+
         /// <summary>
         /// Total number of beatmap difficulties displayed with the filter.
         /// </summary>
@@ -67,8 +70,10 @@ namespace osu.Game.Screens.SelectV2
             return -SPACING;
         }
 
-        public BeatmapCarousel()
+        public BeatmapCarousel(bool waitForInitialCriteria = false)
         {
+            waitingForInitialCriteria = waitForInitialCriteria;
+
             DebounceDelay = 100;
             DistanceOffscreenToPreload = 100;
 
@@ -473,6 +478,8 @@ namespace osu.Game.Screens.SelectV2
 
         public void Filter(FilterCriteria criteria)
         {
+            waitingForInitialCriteria = false;
+
             bool resetDisplay = grouping.BeatmapSetsGroupedTogether != BeatmapCarouselFilterGrouping.ShouldGroupBeatmapsTogether(criteria);
 
             Criteria = criteria;
@@ -493,6 +500,14 @@ namespace osu.Game.Screens.SelectV2
             }));
         }
 
+        protected override Task<IEnumerable<CarouselItem>> FilterAsync(bool clearExistingPanels = false)
+        {
+            if (waitingForInitialCriteria)
+                return Task.FromResult(Enumerable.Empty<CarouselItem>());
+
+            return base.FilterAsync(clearExistingPanels);
+        }
+
         #endregion
 
         #region Drawable pooling

osu.Game/Screens/SelectV2/SongSelect.cs

@@ -208,7 +208,7 @@ namespace osu.Game.Screens.SelectV2
                                                         },
                                                         Children = new Drawable[]
                                                         {
-                                                            carousel = new BeatmapCarousel
+                                                            carousel = new BeatmapCarousel(waitForInitialCriteria: true)
                                                             {
                                                                 BleedTop = FilterControl.HEIGHT_FROM_SCREEN_TOP + 5,
                                                                 BleedBottom = ScreenFooter.HEIGHT + 5,