Did you ever have any resolution? I have the same behavior on my new MY - every time I exit Netflix, it either reboots the car itself, or requires a manual reboot after sitting there with a blank screen for several minutes. Last night was the worst - it rebooted itself, then navigation couldn’t initialize, so I then had to reboot manually - 10 minutes gone for a quick New Girl fix for my daughter (don’t get me wrong, I love watching the show with her, just that it doesn’t make me very happy every time my car is basically non-functional).
Would love to hear the outcome of your service appointment; I am hesitant to book a mobile service, when I imagine it’s just a software issue.