At this moment in time, I would say you either have a regulator playing up or just a matter of a bad connection, take off the door card, pull apart the block connector to the window motor,clean it up, spray with contact cleaner or WD40, may also be the switch so do the same to that and see how you get on. If it does it again swap the drivers door switch with the passenger switch and see if that helps.
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I stepped in a plate of Pasta the other day - now I have to worry about my Carbonara footprint!