@David-TP I reverted to an older firmware and same issue. So it looks like it goes in the trash as it took so long to sort this out, its no longer under warranty.

@David-TP Thanks for the suggestion. I swapped the power supply to one that I am sure is working and same issue. I also tried resetting via the pinhole but it does revert to the same issue.

When I add the second Deco to my network (wireless backhaul) it connects and shows up in the app. After a few seconds it drops off and the light goes from green to solid yellow. Sometimes it will...