Hey,
When you switch between scenes, make sure you are also adding listeners in new scenes. If you added listeners in scene A only and then you switched to scene B, the WarpClient will still try to send responses and notifications to listener game object in scene A because it does not have reference to listeners in scene B. I also recommend you to remove listeners from previous scene when you add listeners in new scene.
Hope this will solve your query. Please try this solution and let us know.
Thanks