Voron 2.4: Can not update MCU 'mcu' config as it is shutdown

This is exactly what I reported here Intermittent crashes with no obvious reason - #14 by patrik-zitko but no one, even Kevin helped. It seems to me like some bug related to CAN, as since that I did not had that problem.

@koconnor pls check this, I am not the only one who is suffering this issue.