Since the OneUI 8 update I've noticed problems with Bluetooth pairing requests.
Quite simply the phone forgets what it is paired to and asks to re-pair to the device.
This happens to both my watch and my car.
Each time I get a notification with a pairing number. It's late at night and my watch has asked 3 times in the last 5 minutes. My car (relatively new Audi) does the same to the point where there's no point syncing contacts etc.
Very annoying. Everything worked properly prior to the update.