@Alexandre. Thank you so much!!

I have 3 Deco M5 units, the main one (connected to the modem) and the other ones. The second unit is correctly connected to the main, but the third one is also connected to the main (instead of being...

@FefeBR I have the same problem. I have 3 units of Deco M5, the farthest of all is not connecting to the near one, instead it is connecting to the main Deco, so its signal is weak.