It's a little bit strange situation as for me about Deco M4 connection.... I have 3 decos in AP mode. Two of them are connected by ethernet cable to the home network, the last one is used as wifi repeater. So, in my phone deco app I see, that one of decos, that actually has ethernet connection, is shown as connected via wifi through another deco that is also connected via wifi :). It' strange, I thought that if deco has ethernet connection it should be used as prior source of data, but no :). Why so? Of course, after rebooting "source wifi" deco, that one that had  ethernet connection changed its source to "ethernet", but nevertheless it's strange as for me