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MCU locking up when I put the car in reverse

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Happened for a third or fourth time over the last week. Not on the very latest firmware yet (think I'm on 21.9). Music is playing, I tap up for reverse and the music goes into the micro loop of the last quarter second and whole MCU is frozen. I reboot and everything comes back. But 4 times? Also happens when I need my backup camera! Anyone else having this problem?
 
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I would recommend calling national support (the roadside number) and have them diagnose and see if they would push 2018,24.1 which seems to not be in general release for the 3 yet. Or it could be a hardware problem. The logs may tell them the reason.