Every once in a great while, I''ll boot up and have the weak RC signal, even though I'm 5 feet away. I just reboot and every time it restarts normally. Transmission signal I believe is the video feed, as opposed to the RC signal. You can lose video, and still remain in full control of the P3. If it happens while in flight, as long as your home point is up to date, the RTH will bring you home. Make sure your RTH altitude is set above the tallest surrounding objects. You can guide it back with the telemetry, map and radar as well. Just maintain a minimum height above trees and other tall objects
SD