Hi, is this a scene with an custom Unity environment?
Like a public bathroom or library, or stuff like this?
If this is the case, then the environment wasn't created/ported correctly for VR.
If the creator maybe had no VR while creating his scene, he sometimes doesn't realize his CUA wasn't set up correctly at the beginning. At the VaM desktop mode, it still looks OK.
Unfortunately you can't do anything about that, than erasing the CUA from the scene.
Repairing a CUA in Unity is a tough work to do.