I set up a mission from litchi hub, downloaded to the tablet on site. It was about a 2.4 mile route around me looking at the flooded trinity river. It went well till I heard "SIGNAL LOST" I could see the drone and I wanted to hit return to home, but decided I needed to trust I set everything right and let it do its mission. It regained signal only to lose again then regain it. It flew to last waypoint set above me. I landed it and have great video of the flood. While this was going on me and the local game warden had a great chat about the drone. He asked general questions looked at my tablet and said he needs to get one!