@David-TP I've made the following changes: Removed the Network and restarted all the Decos. Recreated the Network using an alternative X55 as the Main Deco in case the original Main Deco was faulty....

Main Deco at 100% processor constantly also. if anyone at TP-link is listening?

I read this thread and am worried. I'm about to trash my Deco system too. I already returned a bunch of Kasa smart products to Amazon for a refund, this due solely to lack of customer support. I...

Down to 2 Decos now.

Getting worse.

Any updates on this? Funny how TPLink go quiet as soon as they run out of ideas.