Steffen wrote on Jan 3^rd, 2015 at 10:39am:

After Engine start or during flight suddenly the Radio panel and Autopilot panol shuts down.

The GPS is also off then, right? Have had the same problem. This is not a bug, but this has to do with the to Power-Switches "Copilot AC Instrument Switch" and "AC Instrument and Engine Switch". First one have to be in position "Essential AC Bus", Second to "Essential DC Bus".

Reset both Switches first after loading the flight for prober initilalization. After this all shoud be working as it should  :)