There's a lot of weird .... going on with these BP scanners.
One time you get a coupon required error and you're standing there while people try to figure out what happened.
The other time you board a flight and then you're told you were never on that flight.
Sometimes you board a wrong flight and no one knows.
I really think these scanners are just boopboop machines lol. Or maybe they just beep to say "scan successful", and a human needs to validate...