Bad luck, shouldn't cost too much to repair it hopefully. Definitely a reminder that you shouldn't 100% rely on the technology alone, though of course we all do!
I have front and rear sensors on mine, but when taking the car out of Reverse, it does turn the sensors off automatically, after you reach a certain speed I believe. Doesn't yours do this?
F30 330d M Sport Mineral Grey / Coral Red
Pro Nav/Visibility Pack/Comfort Pack/Harman Kardon/Head-Up Display/Electric Seats/Comfort Access/Adaptive Suspension...