fix

Clean up scene migration synchronization table when NetworkManager shuts down.

Author: NoelStephensUnity

com.unity.netcode.gameobjects/Runtime/Core/NetworkManager.cs

@@ -1665,6 +1665,10 @@ internal void ShutdownInternal()
             // can unsubscribe from tick updates and such.
             NetworkTimeSystem?.Shutdown();
             NetworkTickSystem = null;
+
+            // In the event any exceptions occurred and objects are destroyed prior to being despawned,
+            // clear out the NetworkObject scene migration synchronization table and removal list.
+            NetworkObject.CleanNetworkObjectSynchronization();
         }