My rover has started toggling to HOLD mode instead of AUTO recently. It's consistent; and it doesn't seem to be correlated with loss of GPS or RC. (eg: Was working in Manual immediately before toggling, and had 9 sats when I checked.)
Thanks for the help!
Worth noting:
I have been also having issues where any waypoints I upload are erased on toggling to "AUTO" (HOLD) mode. (When I read back waypoints, nothing is there.) I got around this issue by uploading waypoints while in AUTO mode. (When I read back waypoints, I get the same ones I wrote to the rover.)