I have a factory Volvo radio head unit in my 2021 Volvo VNL760 and it shuts off after 1h even (I timed it with a stopwatch), doesn’t matter what source it’s on, 1h exactly and it goes off, I have to turn it back on. It’s annoying because the factory Bluetooth works thru it so if I don’t turn it back on I will have no Bluetooth for my phone calls. Any idea what would it be doing it? Is there a chance that it’s somehow programmed this way? I can understand if it did that after engine is shut down but it does this regardless, of course it’s annoying when I’m driving.