I have this issue on my new 950 xl. Doesn't recognise me with or without glasses like it should. I got it setup finally yesterday after around 30 mins of staring and slow progress. When I unlock the phone it takes like 10 or 15 seconds most of the time to recognise its me. Much slower than just entering your pin.
Works like it should on my father though!
I have a condition called nystagmus where my eyes wobble slightly due to too much light entering. Could this be the reason it won't recognise me?
Also I wanted to ask: Hypothetically speaking, would it be possible to get a fingerprint sensor and plug it into the usb port and use that as a windows hello device? Since the phones support usb otg right? I know for a fact that usb microphones work so why not fingerprint readers?