Having an issue with my M5 while on my heavy lifter. The gimbal will slam up uncontrollably. It appears that the m5 seems to be loosing connection with the transmitter because when the copter goes (not very far) about 50 yards the gimbal will jerk up. I have attached a video that has a couple quick shots that show what I am talking about. You can also see some strange smaller stutters just before it goes up. This is the second m5 I have had and the other did not have this issue. Any help would be appreciated.