A couple of months ago they deprecated some device type handlers and moved some customers’ devices to new handlers and some oddness occurred around then…
Completely separately, in January they introduced an error into one of the default Z wave switch device handlers and then went through a cycle of a couple of corrections to that and that also introduced some weirdness. Individual customers were not notified of any of these changes, and they don’t seem to have been universally applied. Some people reported they had to go through and update each device in order to get everything in sync again.