New to forum, so not sure if i should link onto this thread or start a new one. My issue is similar, but not quite same. Essentially the radio freezing is accurate of issue description though.
I have had this issue intermittently for quite a few months now. Never really thought worth taking to dealership as it has resolved itself each time. This time, which is indicative of past times, i get into my vehicle and the infotainment system is not working. No sound, no screen, etc. Sometimes in past, it will have no sound but will boot up the screensaver screen. This time, I shut vehicle off a few times to see if it may cycle through a reset, but it either froze on the screensaver screen, or when i once was able to get it to home screen it froze and would not provide any audio. When i used the soft buttons to switch between the entertainment, navigation, etc at the bottom of screen, it showed that i was touching the buttons (the animation of providing the 'pressed button' effect), but it did not actually switch screens. I tried holding the physical power/volume button down for a long period of time to see if this may result in a reset, but nothing happened. I turned volume up and down and no sound. Each time i turned the ignition off and waited and then back on, it would cycle through the opening and then freeze again.
Luckily, i have a minor issue i am going to shop for once they get part in, so i will ask them to do diagnosis on this as well. I will report back on their conclusions.