This is Unity 2017.1.1f1, working with SteamVR for the Vive. When switching scenes, the standard loading screen/compositor view shows up (the dark blue/greyish gradient room), but not completely. Parts of the “walls” (above the player, below the player and some of the sides) are white. Sometimes the whole leading room shows up after a while, sometimes the scene loads before it fixes itself.
I can’t take a screenshot, because the buggy view only shows up on the HMD display - it looks correctly on the Display Mirror.
When I try to implement a custom loading screen (plain color, different skybox), the same thing happens but with the new skybox in the background beneath the white walls instead of the standard view.
I already reinstalled SteamVR and the bug persisted through different Unity versions.