Today the passenger side window on my 2015 F56 stopped working properly. At first, it started out by not going up automatically, I had to hold the switch to get it to go up. Now, it goes up sometimes, and then doesn't go back down. Eventually it seems to fix it self but it keeps happening. It happens when I use both the driver's side and passenger side switches. I'm thinking it could be a bad regulator or motor. Anyone have any ideas?