Bought AC600 starter kit last July, worked well on any power outlet in the home I tried. Just added another range extender node and now the weirdness begins.

Tried quick setup pairing new node to existing, seemed to work but no network connectivity on either node device. Many attmpts to re-pair got same results

Fast forward to complete factory reset of each node, new SSID passwords etc and tested both and they worked and I took the new node to a remote location I had used before with old node and it worked UNTILL I pluged in a scend node, no network connectivity with the LED something looking like a house turned green (was off when things worked.

Original is hardware 4.0 and new node is 4.8

Any ideas what to try next?

My existing netowrk works well within range, no issues there