Faster finger print sensor since new Nov update

Did you try Safe Mode yet? I'm really not seeing this kind of behavior (although I have a 6 Pro).
 
Hmm. So Developer Options are completely off, right?

Go to Settings>Security -- both your Security Update and Google Play System Updates are current (Nov 1)?
 
Hmm. So Developer Options are completely off, right?

Go to Settings>Security -- both your Security Update and Google Play System Updates are current (Nov 1)?

Just turned developer options off. Everything seems to be up to date.
 
Ok, now that Dev Options are off, see if the problem persists.