@David-TP Hi I would refer you to this thread... https://community.tp-link.com/en/home/forum/topic/610798?sortDir=ASC&page=7 Prior to the most recent update, most of my Nodes indictaed that they were...

How to force a node to use PLC rather than wifi. Since the most recent firmeware update they always use wifi even when there is a very weak signal.