My 680 hexa going crazy from the 1000mw FPV TX scrambling the GPS system. At 19 second I turn position hold on. Then a wild ride for 20 seconds till I shut off Gps and brought it in manually. It climbed to 400ft quick. Running 6s and 40amp esc's. Boscam for FPV and remote switch to Gopro Hero4 on 3 axis gimbal. Cheap Chinese ground station for recording fpv.