Fix client-side replay error (#27332)

(cherry picked from commit 0ae942101a9f79ff49c3ffb3bfe257daa76719ff)

Content.Client/Replay/Spectator/ReplaySpectatorSystem.Position.cs

@@ -198,6 +198,13 @@ public sealed partial class ReplaySpectatorSystem
         if (args.Transform.MapUid != null || args.OldMapId == MapId.Nullspace)
             return;
 
+        if (_spectatorData != null)
+        {
+            // Currently scrubbing/setting the replay tick
+            // the observer will get respawned once the state was applied
+            return;
+        }
+
         // The entity being spectated from was moved to null-space.
         // This was probably because they were spectating some entity in a client-side replay that left PVS range.
         // Simple respawn the ghost.

Content.Client/UserInterface/Systems/Alerts/Controls/AlertControl.cs

@@ -117,8 +117,7 @@ namespace Content.Client.UserInterface.Systems.Alerts.Controls
         protected override void Dispose(bool disposing)
         {
             base.Dispose(disposing);
-
-            _entityManager.DeleteEntity(_spriteViewEntity);
+            _entityManager.QueueDeleteEntity(_spriteViewEntity);
         }
     }
 

Content.Client/UserInterface/Systems/Alerts/Widgets/AlertsUI.xaml.cs

@@ -97,7 +97,8 @@ public sealed partial class AlertsUI : UIWidget
             }
             else
             {
-                if (existingAlertControl != null) AlertContainer.Children.Remove(existingAlertControl);
+                if (existingAlertControl != null)
+                    AlertContainer.Children.Remove(existingAlertControl);
 
                 // this is a new alert + alert key or just a different alert with the same
                 // key, create the control and add it in the appropriate order