Yeah I’ve had this happen to one of them now. Tried deleting and removing from keychain and adding again with apple and iPhones, google home hub and android devices in google home, home assistant.
Even waited for iOS 18 to make sure it wasn’t a software bug. It’s just dead in the water. All physical abilities, turning light on and off and local programmable settings work but the matter/thread has disappeared
I’ve contacted support to see how to go about switching out 1 switch instead of the entire 5 pack the way the RMA form pulls up