Thanks a lot for the very fast and precise response!
Thanks for the disabling DirectVR idea. I’ll admit, I’ve only tried playing Portal 2 with my mouse and keyboard, so it was quite annoying/impossible to use DirectVR all that time as that involved me needing to turn my head 180 degrees (towards the back of my chair) and away from the keyboard when going through a portal.
Perhaps if I stand and use a gamepad / touch controllers, I won’t mind the glitch if I go slowly through the portals. Thanks again!