@Remiq 

I did a hard reset twice.

I have everything set up. Denon is connected, I restored the factory settings in Denon, but there is still a problem on TP Link.

I wonder why it works properly on the Asus 1200 and Tenda TX2 Pro or the hot spot from the phone, but it doesn't work on the TP Link.

Asus is wifi 5, tenda wifi 6. Sometimes it will work on tp-link. but I have to wait about a minute before the radio starts working.

DHCP is enabled on TP Link and also on Denon.

Any other suggestions?

  @Remiq Hello, I know what the problem is with the Denon dra-800h receiver, even though it connects to TP Link and the Internet radio does not work, or you have to wait over a minute for the connection, it does not work directly with the TP-Link Archer 23 ver 1.2 router, probably because it is based on the Mediatek chipset, if I connect another router before TP Link and connect TP-Link via LAN to WAN in TP Link, then the Denon network and Internet radio also work. Tested with three routers that are before TP Link.

It seems like you're experiencing compatibility issues between your Denon dra800h receiver and the TP-Link Archer X23 router. Have you tried adjusting any settings on the router or the  whatsapp update receiver to troubleshoot the problem.  It's strange that it works fine with other routers but not with TP-Link ones.