Occationally my serial console messes up severely like this:
Typing doesn't work there are all anymore. Though the machine still functions fine. So if I reboot it (as shown in the screenshot. PC Engines apu2 is where the reboot has begun) it is all fine again.
It only ever seems to happen after I reconnect the serial cable. Though I can't say for sure.
Any idea what could be causing this and how I can fix it or even better prevent it alltogether?
This is a Debian 10 machine with a customized 5.4 kernel.