Anyone know what might cause the rudder port output to stop working? It's holding the servo powered in a locked position and I can see the rudder input moving in the Android app, but no rudder movement. Rudder servo works fine in one of the cyclic ports.

Got it working. When the servo stopped working, I checked settings in the Android app, and both servo types were set at 1520 pulse . However I hooked up usb and computer to try a factory reset/reflash firmware, but before I did that I noticed servo pulse was blank. Updated it to 1520 and it works now. Can't figure out how it lost the setting though.