CameraStacking is overkill

[FairplexVR]

So basically, having an extra camera only for the ClientSimMenu is, to my eyes, a bad design choice . This negatively impacts the editor performances.

I've suggested a better solution in a previous dev blog with a UI shader that doesn't waste any cpu time. Please consider using this method instead

If mirroring vrchat client is an important point, at least you may want to disable that cameraStacking when the menu is closed because it really doesn't need to be enabled all the time.