I have a 2014 M6 convertible. My 4th M (others were M5s). I love the car. But, when I close up the car -- put the top up and windows up -- about 20% of the time one of the side rear windows kicks back down due to the safety function. I guess it hits some resistance. It has gone in for service 3 times -- both side rear window motors have been replaces (one time the local dealer did not fully reinstall the side panels so it was another trip in), and the roof has been adjusted. It does not happen all the time and of course doesn't seem to happen when the car it at the dealer. It is annoying especially if the weather is looking like rain. Has anyone else experienced this??