This seems to be happening more frequently, lately. I take off, hover to check stability, set the camera's exposure and set the view. Then I start the video recording and begin flying, only find a few seconds later that the camera has stopped recording. I start it again and again, after a few seconds, it stops once more. On a recent outing, I came home with ten video files, only one of which lasted more than 30 seconds. When the 'record' button stayed down, I got a full length file from it. It's a bit annoying. Continuity is not possible and when it did work properly, it was well into the flight, so, no lead in.. Any ideas, cures, reasons?