So far ax5400 works very well. It is also a lot bigger unit than ax58u. I will keep my fingers crossed for a day or two , to see if restarting will occur. But for now, i think that problem is gone
Now I noticed that my NAS is getting unreachable after a while. Can anyone see something suspicous in logs for 10.12.2022. Around 6.30am network connection is restored (that is my scheduler) , althoughg the router is powered on all the time.
Then my wifi was showing that there is no internet connection, after a while my nas on address 192.168.2.100 was unreachable.