@TP-Link I've sent the suggestion through the app, thanks. I still have a question which is the main deco thing, as said above I use ap mode with Ethernet back haul, but according to the topology...

According to the topology graph give by tp-link, ap mode with ethernet backhaul should not be having main deco, but it appears with a main deco in my deco app, and it is the signal source for all my...