@woozle It seems that the problem was created by the repeater because everything works fine since I turned it off. I do not understand why, but I am happy that the problem is solved. Thanks for the...

@woozle Thanks for the reply. I removed the repeater and I rebooted the router. I will see if the problem will appear again. But I do not understand why a repeater would change the MAC address....

The problem exists with routers WR842ND V 1 and WR1043ND v1 I have a laptop which runs Ubuntu server 22.04.01 and is connected using WiFi to a TP_LINK TL-WR842ND or TL-WR1043ND router. I have...