Same thing here.... Using VR and hitting Left Alt + C does not convert mouse head movement into a visible cursor. I can see the cursor on any other view if I Left alt + C. Now the cursor does "work" even though it's not visible. Random clicking and moving around has zoomed in on a console here and there. I have tried full screen as well as it was in windowed mode to begin with. Mouse cursor is also confined to the game window.
And yes. I have selected the options to use them in the editor and selected the role