Refactor multiplayer background to remove selected item bindable

osu.Game/Screens/OnlinePlay/Match/RoomSubScreen.cs

@@ -39,10 +39,7 @@ namespace osu.Game.Screens.OnlinePlay.Match
 
         public override bool? ApplyModTrackAdjustments => true;
 
-        protected override BackgroundScreen CreateBackground() => new RoomBackgroundScreen(Room.Playlist.FirstOrDefault())
-        {
-            SelectedItem = { BindTarget = SelectedItem }
-        };
+        protected override BackgroundScreen CreateBackground() => new MultiplayerRoomBackgroundScreen();
 
         public override bool DisallowExternalBeatmapRulesetChanges => true;
 

osu.Game/Screens/OnlinePlay/Multiplayer/MultiplayerRoomBackgroundScreen.cs

@@ -0,0 +1,41 @@
+// 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.Allocation;
+using osu.Framework.Extensions.ObjectExtensions;
+using osu.Game.Online.Multiplayer;
+using osu.Game.Online.Rooms;
+using osu.Game.Screens.OnlinePlay.Components;
+
+namespace osu.Game.Screens.OnlinePlay.Multiplayer
+{
+    public class MultiplayerRoomBackgroundScreen : OnlinePlayBackgroundScreen
+    {
+        [Resolved]
+        private MultiplayerClient client { get; set; } = null!;
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            client.RoomUpdated += onRoomUpdated;
+            onRoomUpdated();
+        }
+
+        private void onRoomUpdated() => Scheduler.AddOnce(() =>
+        {
+            if (client.Room == null)
+                return;
+
+            PlaylistItem = new PlaylistItem(client.Room.CurrentPlaylistItem);
+        });
+
+        protected override void Dispose(bool isDisposing)
+        {
+            base.Dispose(isDisposing);
+
+            if (client.IsNotNull())
+                client.RoomUpdated -= onRoomUpdated;
+        }
+    }
+}