Server Proxmox freezes randomly

But this hardware has a soft on/off button, so once the machine has power again, you need to start it with manually holding the microswitch on the front. So so far my automation solution. Bummer.
I have some of those generic button pusher IoT devices to do this for me....
 
I also run Frigate in LXC and get this freezes/crashs every week. Sometimes days or hours. Could it be related to NIC high activities (cameras)? Tried disabled checksum off load on nic, disabled all c states related features on motherboard BIOS, hdmi dummy plug, unfortunately nothing works. 2 lxc and 1 VM. Mostly crashs over night, 2, 3AM.

I got it solved by changing the ram.

I did a 24 hour memtest, with no errors.

But after I chanced ram, the problem is gone