So, it is definately the switch and not anything going on with the Deco. I moved one of the switches to hang directly off an edge router port configued just like the Deco... trunk VLAN 1 and...

So, I just got done adding some TP-Link items to my network in order to get better WiFi coverage while also segregating IOT devices into a VLAN. Everything works, sort of. I have an edge router...