@Palo0406 so confirmed not working even within the same double wall plug :( so what now return it?

@David-TP I tried it already in one room but (no PLC icon in network map) powerline not not working . I tried to use decos within the plugs from the same phase ... but not help .When i disconnect one...

@nse2001uk Exactly the same PLC not working the same firmware as your .When i disconnect one of the deco units than sometime there is PLC comunication but 50% of time is not working than again start...