I have noticed that after about 3 to 5 minutes of flying my camera feed from the drone to my controller goes blank. The drone still moves fine and it doesn't affect the operation at all. Lucky for me I haven't flown out of sight yet, would be scary if it ever got out of my line of sight. Also on the controller it says disconnected but still is sending a signal to the drone. I have to land and restart both the drone and controller then it will restart the video but then it will blank out again after that time. It did it with both the old firmware and the new version, I thought updating it would fix the problem.

What cable are you using? If you are using the one that comes with the drone, try using a different one, I had the same problem and that's what fixed it for me!