Well, that was premature joy.
The problem came back after first power off and reboot. Now getting the same error again after sleep.
Have not been able to fix it again. Tried even fresh install on a different SSD and again the same problem. At that point I started to think that maybe the motherboard LAN hardware is faulty, so I downloaded Ubuntu image and installed it. Wired connection works just fine under Ubuntu, including after waking from suspend/sleep.
Did not know what to try next, so I thought I'll try asking for help from here again.Here is old.log after another failure waking the wired connection after suspend: