@Papaey I might have find a work around. Set your 2nd sattelite as your main deco not the one that is hardiwred to the router. So far so good. My topology become like this. Router- hallway(2nd deco...

When wiill deco e4 and m4 get the update to choose signal source?. My fourth deco (e4) always connect with the 2nd deco. Please let us also have the update for us peasants.