I had this problem and it finally went really bonkers scrolling through screens on its own coincidentally on the way to get my bike serviced. They tested it and contacted Garmin, who have to give approval for replacement, not BMW. They gave the OK after the dealer tried the removal of battery reset which did not work.
Rode away with a brand new one.
Seems like it could possibly be a batch issue if so many are having the same problems.
Good info, cheers