Had a 7 minute flight and came in to land, and at about 3 meter height, whilst flying right over me, my M2 Enterprise Dual gave me a "Aircraft Disconnect" message in red on the Smart Controller. I was able to still control the aircraft and land it safely, but the view from the camera was blacked out. I switched off the M2 and the controller, waited a minute and switched both on again. Once connected, the SC showed that the aircraft was "Ready to Go", but the screen was black, as if the camera was not functioning at all. The rest of the SC screen looked normal, but the picture was black. I took a photo and strangely enough the camera took a photo, but the screen remained black. I didn't mess with any settings whilst flying, except for taking two photographs. I have now switched off both units, waited ten minutes, and upon powering up, the camera works as per normal again. Any thoughts why this may have happened?