I have two of the GE Smart Appliance model 45603 which has worked very well with my SmartThings hub for many years. Sometime last year I started to have some issues with it. It would lose connectivity, only turn devices on, but not off. I have my SmartThings hub (v2). I have a 2nd Z-wave controller (Simon XT) as a secondary panel which can control the modules just fine. The other z-wave devices are not having any issue. I’ve turned off device health and no change. I’ve done factory resets on the modules, and no go.
Any thoughts on what to try next? They control two lights in my basement which will turn on when the motion sensors on the Simon XT detect motion, and it works great. I cannot turn the devices off from SmartThings, I have to do it from my Simon XT panel. When I re-add the devices, I do it all from SmartThings.