occasional failure of the ZV remote control

Since I have my 9-3 ARC (11.03), the remote control for the ZV has occasionally denied its service. Has happened about 5 times since then. Then always had to lock the door with the emergency key and after activated ignition everything worked perfectly again. However, the problem occurred for the first time when locking off. I just put the key here again in the ignition lock and afterwards everything worked. I now suspect that it might be because of it. nnnt, how to pull the key out of the ignition lock (???). Do you know similar problems? Otherwise I will have it checked in the workshop. But with such sporadically occurring errors this is probably completely for nothing if the problem does not happen by chance there. Greetings Ded