@David-TP Basically, I have AX73 as my router and deco is my access point. 2 of the Deco is connected by LAN via AX73 port and other 2 is wireless backhaul. I don't have any switch.

I have 4 Deco M4 around my house. Deco is in AP mode. One of the M4 keep blinking red light and showing offline in deco app when connect via ethernet backhual for a day or two. If you use wireless...