Fingerprint sensor occasionally disappearing

[PP23]

Hello,

Device is S10 with Android 10, latest updates (March 1st 2020)

I have persistant issue with fingerprint reader. It occasionally dissapears from the lock screen without any action by me.

For example:
-I unlock it with my fingerprint as usual

-I lock device with power button

-I tap on screen to wake it up after few minutes, NO FINGERPRINT SCANNER SHOWN,

-I then unlock it with password

-I then lock device with power button

-now fingerprint is shown again!!

Note: I didint failed to unlock device even once before this, I have not added any BT device to unlock it with, this happens on random intervals inside/outside home. Happened also with Android 9. 

Bug or security feature, it is quite annoying.

Does anyine has explanation for this?

Thanks

[Rick51]

The same thing began happening with my A20 two days after it arrived.  Frustrated, I got on the phone with Samsung's tech support who diagnosed it remotely.  It still doesn't work!

[Members_JG3Hmab]

S21 ultra One UI 4.1

Same here, its annoying AF.

[Nikhil121]

Heyy ehidaimen. I am currently facing the same issue. Have you found the fix for it?