Vive Unity OpenVR SDK bad quality in play mode

Dear developer community

We are developing a Unity Game with Oculus and Vive support.
Currently, we have a problem with the Vive Integration.
We use the SteamVR Plugin version 1.2.0 and The Lab Renderer version 1.0 we also tried it without the Lab Renderer.

For simplicity, I will post a few pictures.

If you start the Game W/o any VR SDK it looks like this

https://puu.sh/tDZNl/4fd45d5e0d.PNG

When we add then the Oculus SDK it looks like this

https://puu.sh/tDZNm/216be39c02.PNG

And finally, if we add the OpenVR SDK for the Vive it looks like this

https://puu.sh/tDZNh/2083038722.PNG

Has anyone an idea what might be the cause?

Or has anyone the same problem fixed?