I have this issue too on my work laptop, have been seeing this since 15-20 days, definitely after v15.4.1 upgrade.
The laptop would work just fine for some time but as soon as the screen saver activates after some time of inactivity, bam, not able to login again, both with finger print as well as password. The wheel just keeps spinning.
I have to then shut down and restart the Mac to be able to login. I have tried clearing up the login items, have nothing there now but the issue still persists. This lock-up doesn't happen for some time after a fresh restart, but as time goes by you're sure it's bound to happen again.
There are some settings I can't change as it's a work laptop with configuration managed by a profile by my system admin. So some work related security and tracking apps are allowed to run in the background, like CyberArk, etc.
I can't even upgrade to the next OS version until that update is okay-ed by the admin team and pushed to my device.
It is frustrating having to restart the Mac at least 1-2 times everyday. Please let me know if there's snything else which can be done.