Our issue might have nothing to do with VR and how it renders, but with the Message Bus. We are using this for communication between two apps and the app wit Pixel Streaming plugin crashes on startup with the upper mentioned error message. In our VR package we disabled Pixel Streaming plugin as a test and this one starts fine, even with the “-Messaging” command in the short cut (this is a bit off-topic).
This was an update to my first comment. So our crashes have probably nothing to do with VR in combination with Pixel Streaming. Sorry that I couldn’t help, but identifying another issue…