The problem with the loss of radio stations after setting them as favourites only seems to be resolvable at the moment by doing a reset back to factory setting on the MMI console.
Did this on both my new vehicles (Q3 and A1) in september and they have been absolutely OK since.
Had the same problem with the dash cams on both my vehicles, they wouldn't initially connect to the UTR app on the phone.
Take your phone into your car and with the ignition on open the WifI settings on the phone and you should see AUDIUTR_?????? as an availble network.
Select this network and enter the default password 123456. You should now be connected.
Your dashcams are probable V2 so the app will update itself to V2, then the WiFi network name (SSID) for the UTR on your phone will have changed to AUDIUTR2_??????
Best of luck.