Originally Posted by
B. Diddy Do you have the option turned on to swipe down the notification panel with the fingerprint sensor? If so, I wonder if you might be actually initiating a first swipedown with the sensor. Seems unlikely, but it may still be worth turning that option off and seeing if the problem persists.
That option is turned off. I think I know why this is happening.
If you swipe down with one finger while the phone is on the lock screen, you get the whole quick settings panel. That's normal behavior. Basically that behavior persists for few seconds after the phone has been unlocked. The phone is not registering quickly enough that it's not on the lock screen anymore.