I've had too many times of failed attempts at fingerprint access, then the phone forces me to enter my PIN number. Even more frustrating, I have to enter my 4 digit pin number VERY slowly one box at a time, otherwise another different problem occurs. I have my phone enabled in settings so that with a triple tap on the screen, there is instant magnification of whatever is shown. So when I try entering my pin numbers too quickly into the box, a magnified view of the screen shows up instead of phone access. Then I have to start over again by triple tapping the screen to UN-magnify, then entering the 4 digit pin number very slowly one box at a time. I find all of this frustrating. But I like the triple tap magnification feature a lot (when working as intended) so I'm not willing to disable this. Aaaargh.
I miss the rear finger print sensor of my old S9 phone which worked perfectly without frustration!!