I’m sure that’s very frustrating.
A number of people have reported a similar problem over the last few weeks. See the following thread:
So for the last several days to a week or so my V2 hub has been exhibiting some strange and unusual behavior. It started with getting notifications my hub is offline during random times (day night doesn’t matter) I was coughing this up to my internet briefly going offline. I don’t think this is the case anymore, it looks like the hub has been rebooting itself. In the past 48 hours it’s rebooted 6 times, now one of those was me. Over the past several days the response time is very slow for some devices. My presence sensors would fire off down the street like they should and may not disarm the alarm for 20 more seconds.
Last night brought the issue to a head with my wife because she came home before me and I can see in the log the app recognized her arriving home at 4:55 and triggered the d…
“Unavailable” is a device health status specific to the SmartThings platform. It’s not the same as the device “unpairing.”