@cariacou This seems to point to some slight instability with your Z-Wave network or connectivity to SmartThings cloud. The DTH is currently setup to perform a health check every 32 minutes. If SmartThings (cloud) doesn’t hear back from the device in time, it’ll declare it
On the one hand, I suggest you check your Z-Wave devices topology and the placement of your SmartThings hub to see if you can move the hub to a more central location or add a repeater. A Z-Wave network repair may help too. On the other hand, I’ve also read that the “Health Check” capability for 3rd party DTH is not mature and thus un-documented. So I’ve pushed an update to disable it for now. Feel free to give it a try.