I'm not sure if this issue is only affect my system.
But it annoying as crap.
The computer boot up and showed error for: e1000e 0000:00:19.0 eno1
I've tried this solution https://unix.stackexchange.com…ic-and-hardware-unit-hang but error persist after it wake from hibernation, then it shut down with in 15 seconds.
I then restored OMV v5.5.14, and it running fine.
I don't see that error anymore.
Next, I updated it to 5.5.19, the system error happening again !
In addition, I've also disabled the C1E feature in the BIOS too.