Had the same thing the other day, tried turning the car off and on again while sitting at traffic lights, when the car came back on I selected drive and nothing happened, couldn't drive, queue of cars behind me, switched car back off, back on, now missed a whole set of traffic light changes with a queue still behind me, car was working again. Still no radio module. Next day got in the car, same thing with the radio module, but this time I sat there for 1 min, radio module then came on. Been fine since but have noticed that the MG badge comes up on the infotainment screen and stays there for a lot longer than usual on start up,