Known problem, engineering is looking at it. It’s affecting multiple brands, looks like Z wave devices that use security encapsulation. See the following existing discussion thread:
I have the SmartThings Hub v2, and currently have installed about 3 dozen Fibaro light switches (Z-wave) and a handful of other devices. They have been stable for a few months now (though I still have another 70+ Fibaro light switches left to install). I use the Classic SmartThings app (though I have the new App as well - but it lacks a great deal of functionality).
When I got home tonight, I noticed something very strange. If I turned on/off a Fibaro via a physical switch, the lights turned on, and the app recognized the state change. But, if I tried to remotely turn on/off the Fibaro (via the Classic or New App), the screen flashed for a split second and the state did not change (and the lights themselves did not change state).
And this happened for all 3 dozen Fibaro switches. If…
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