having the same problem.
core i3 version. they even exchaged my unit, which was having blue screens "PFN LIST CORRUPT" when trying to use the camera after it was bugged by windows hello. happened randomly just by using camera either.
my new replacement device has the same issue, camera gets bugged by windows hello from time to time, haveing to restar.
im sure this is software related, not hardware, since 2 devices had exactly the same problem and becasuse it fixes by a reboot.