FB Soul owners group, several people are having issues with radio switching frequencies the past few days. A couple of years ago this happened and I think it was concluded that it happened with a Sirius update.. Mine so far has not done it.
I haven't experienced any source changes other than at cold startup. I can turn off the car while listening to FM yet on starting the car, the radio starts up with the USB source. I've got the default + radio. No UVO.