@Teoatino O.K. Changing to access point mode to fixing the situation :-)

@ArcherC8 Thanks for the answer. Everything you described, I have done before. The only thing left for me is online support. In the evening I am trying to change the MTU value for the WAN port ......

Hello. I have recently had TP-Link Archer AX73. Works great, very strong wifi. But there is one "thing". I have a gigabit connection from UPC, when I connect my desktop computer directly to the...