@Ivaylo_Angelov What type of wireless repeater you are configuring ? If you set WDS repeater, then try the Universal repeater and see if that helps.

@ramki_87 When using no-ip.com account and WAN IP address is private then disable WAN IP Binding: That should push your public IP address in the no-ip.com database.

@Ron_M TP-Link Archer AX90 is equipped with ESMT M15T4G16256A 2Gb DDR3L RAM, providing 256MB of system memory, and also equipped with an ESMT F50L1G41A 1Gb SPI-NAND Flash with a capacity of 128MB,...

@Mahi223 Make sure your wireless security settings are like the following: Then test again. If the problem persists capture and post here the error message if any.

@teknoraver If the network status info from C6 is not important for you then the Kevin's quick fix will prevent these messages exchange. The changes regarding DHCP requests frequency would require a...

@teknoraver Can you try now to set the Static IP, DHCP server to Auto and observe again if the DHCP messages are there and what's the clients number ? In Auto the device will sense if there's an...