I discovered that when I reach a distance from the controller of a few hundred feet, the two switches on the back of the control do not work. I have the C1 set to switch the wheel between gimbal tilt and gimbal yaw. The C2 switch to align the camera to the front. These functions work good as long as I am under a couple of hundred feet. Further than that, they have no affect. Everything else continues to work, but not those 2 switches. So if I am set for gimbal tilt, the wheel will control the tilt. If I hit the C1 switch, it still controls the tilt. Has anyone else experienced this? Any ideas on what is causing this?