Network missing after standby

Hi,

My OMV installation (6.3.12-1, clean install 6.x) is having an issue that is very annoying.

Sometimes, after the NAS has been in standby (suspend) and is woken up (either by RTC or WOL), network connectivity is down.

OMV/Debian is working, lights are blinking on the LAN port. Reconnecting the LAN port does not help. To solve this, I shutdown and restart the NAS. However, if I'm away, I can't do so.

Below is the syslog when OMV is woken up. There are clearly errors reporting there's no network.
OMV side there are no specific network configs, everything is DHCP, and the IP is reserved on the router.

I have not changed anything in the OS that can interfhere with OMV configs.

Quote from chente

possible incompatibilities with Linux?

I'm sure it's not this.
I've built this NAS in 2020 (hardware in the signature) with OMV5 and never had that issue.

The issue started to appear only on OMV6 (clean install) but does not happen all the time. I'll check the bios, but WOL and RTC are working by themselves.