I have two of these sensors and they both do the same thing. They will join, but the stay stuck on Motion. Not much I can do with them. I have exculded them and rejoined them. Waited days for them to sync up and talk to the rest of the zwave mesh. My battery says 100% and I even had it within 10 ft of the hub under a blanket to ensure it didn’t detect any motion. ??? Any suggestions are appreciated.
Have you tried a Z-Wave Repair? In App, Hamburger Menu “More” then “Hub is Online” then scroll down to “Z-Wave Utilities” then “Repair Z-Wave Network”.
Might work. Also try removing the batteries for 15 seconds.