This has happened on my car on more than one occasion. You are correct in saying that restarting the car fixes it most of the time though.
Best of luck to you getting BMW to do ANYTHING... I fear they are scared of their own invention. My DCT car has been nothing but a mess.
11' E90 M3 6MT | Jerez Black | Black Ext./Carbon | ZCP | ZCW | ZPP | ZTP | 302 | 403 | 507 | 5AC | 655 | 6FL | 752 |
15' F80 M3 6MT | Black Saphire | Black Full | ZEC | ZLP | 2VF | 2VZ | 5DL | 688 |