You are not giving much info to go by there, but I was having problems with my radio changing channels all by it's self. Also a 2012 with a 730N-RHR radio. I fixed it by updating the radio software. The fix involved purchasing new mapping software, that also comes with new radio system software. I haven't had any problems with the radio since the updated software was installed. Don't expect much of a change with the new mapping software, but everything does seem to work better. Its not cheap at $150 but it worked.
https://www.driveuconnect.com/support/software-update.html