I have a weird intermittent issue and am looking for a direction to resolve it: when I receive an incoming phone call over bluetooth while listening to XM and the caller terminates the call before I do the XM radio does not come back on, it just shows the song playing on the screen but no sound. Here's where it gets weird, I can change XM stations and it shows different songs playing on different stations, etc. BUT when I switch to FM sound comes through fine and and I can change stations no problem. Switch back to XM and same thing, shows song playing, changes station, but no sound. As soon as I turn car off and back on its fine. Anything I should suggest the dealer try for my next visit (I have one more free service but they were not successful at trouble shooting a previous non-audio issue that went away on its own).