I experienced a strange issue several times. Soon after the take off the control signal disappears, the video recording on the drone stops. The video link to the controller stays up. It goes on for several seconds, until the auto return is started. The control link is reestablished almost immediately and the recording is restarted. The drone flies normally thereafter. Examining the files, I noticed that the short videos before the signal is lost were exactly the same size, so in both cases, the signal was lost 12 seconds after I started the recording (not after taking off). I just don't know what to make out of it. Once it happened when I was under trees, and the drone almost went up into them while trying auto return.