Engine.Core/Systems/UpdateManager.cs

@@ -75,9 +75,16 @@ public class UpdateManager : Behaviour
         args.BehaviourRemoved.LastActiveFrame();
     }
 
+    private void CallLastFramesBeforeExit(object? sender, System.EventArgs e)
+    {
+        for (int i = lastFrameUpdates.Count - 1; i >= 0; i--)
+            lastFrameUpdates[i].LastActiveFrame();
+    }
+
     public UpdateManager()
     {
         firstFrameUpdates.OnCollected.AddListener(OnFirstFrameCollected);
         lastFrameUpdates.OnRemoved.AddListener(OnLastFrameRemoved);
+        System.AppDomain.CurrentDomain.ProcessExit += CallLastFramesBeforeExit;
     }
 }