Earlier this week I was flying my Phantom 3s with Litchi and VR. I was flying low over some tree tops and my SIL said that he could not see it anymore. About 900 feet out it started beeping and initiated RTH. It started back and when I got control of it again I stopped the RTH. Went another direction and it happedned again. Gained controled, went up in height and made it to 1250 ft away and the RTH kicked in again. So...3 times the RTH kicked in when it lost signal, all times running on Litchi and VR.