Hello i recently bought a TL-WA854RE to extend wifi provided by Archer C7 v4.0 frimware version 1.0.8 Build 20190411 rel.65590(4555). Using different SSID for each. But after pluging in the extender the old wifi "stops working". I am able to connect to it, but it says "no internet". It starts to work after 5-10 minutes. It looks like it takes forever to receive ipv4 adress from the router. It works fine with the extended wifi, which is weird because i disabled DHCP on the extender so I gues the router is taking care of that now.

After unpluging the extender the old wifi works fine. Any idea what the problem is and how to fix it?