Hi all. Yesterday the Son came out and the wind died, so I went for flight #3.[ I have the old motors.] Did the warm up compass call. good, fresh charge on battery. I flew around my neighborhood. I had been in the air for about 6 min. At 3000 feet out about 120 feet up. The signal starts to break- up and I turn around and head back,. Now this is where I get the safe to fly in nonGPS mode??? [I have 15 sat] And the Phantom is not responding to my stick movement, It is just hovering. I walk around to get better LOS ,[ there is a big tree near by]. I hit RTH, and nothing it just hovers there. This all happen in a few seconds. I did get control back after I moved a bit from the tree. And got home safe. I landed with 65% battery. Now I am scared to fly, because I don't know why RTH did not work. My P2 would go in to RTH at about the same spot I was at, with the P3.?? I don't Know anything about healthy drones, or flight data. I will have to look at that. I see a lot of post where P3 have fallen out of the sky. So did I do some thing wrong or should RTH have worked.???? Thanks for any input.