Known bug, don’t hold it in portrait mode.
No – unlike the unlimited mirror resolution, having Nearclip set to Forced (or even Dynamic) can cause serious issues in some worlds, and we want to avoid unnecessary support issues.
We might reconsider this in the future but we’re fairly firm on this decision for now.
Can you post about this on the feedback boards if you’re experiencing it on the Open Beta? Alternately, try contacting our Support team.