Automatic mounting/unfolding of mirrors

Hello dear forum community. My friend has the problem with her 1.0 TSI Xcellence, that the mirrors only fold out according to the mood. Sometimes when opening the doors via Kessy, sometimes at engine start, sometimes not at all and only after a few games on the adjusting button. A real “system” when they do it or when they don’t can’t be recognized at all. She already suspected that it could have something to do with the safety belt, but there is also no resistance to it. Just do what they want. Or don’t do anything either. Maybe one of you has already observed this phenomenon? Is there possibly something wrong with any coding? From the settings in the vehicle configuration everything would have to fit so far… For tips I would be very grateful to you, otherwise probably only the ride to the friendly one will remain.