Also having this problem.
A few days ago my remote randomly stopped working when box hidden. Still works when not hidden though so not batteries.
Went to settings menu and was told another remote was paired! I unpaired it and then checked the instructions. Was told to press clear + tv, and was it for green light. Nothing. I then left the menu and went back to the menu. Was then told to hold info for 7 seconds, wait for green etc. Also nothing.
Seems like the whole pairing user glow is buggy as well as the remote itself!
Would love to get this fixed ASAP.