This is happening for some time, I cannot find any justification but what I can say is:
It still respond to pings.
Keyboard or monitor does not respond, nor GUI or any service
I've configured the syslog on an external laptop and the last logs were:
Jan 13 04:02:39 Infinity Docker Auto Update: Community Applications Docker Autoupdate finished
Jan 13 07:47:02 Infinity emhttpd: Unregistered - flash device error (ENOFLASH7)
Jan 13 07:47:03 Infinity emhttpd: Plus key detected, GUID: <omitted the information as I am not sure if this is personal> FILE: /boot/config/Plus.key
Jan 13 07:50:25 Infinity kernel: br0: port 2(vnet0) entered disabled state
Jan 13 07:50:25 Infinity kernel: device vnet0 left promiscuous mode
Jan 13 07:50:25 Infinity kernel: br0: port 2(vnet0) entered disabled state
I don't know what time precisely it stopped responding but those were the last logs captured.
I am running 6.12.6 but it happened with older versions as well.
Any ideas on what is happening or what can I do to find the root cause?