The images are a good start point, you may need to dig deeper into your device events logs as the Recently tab is only showing that the SmartApp has sent the command to the DTH. I’m not seeing too many acknowledgements (it just means that you can’t tell if the command reached the device or not from the Recently tab). For example at 9:02am I see the acknowledgement from the thermostat that the setpoint was set to 68F. I don’t see any during the night (just commands being sent to the DTH).
In general there could be three reasons for what you’re seeing:
- There is a communication issue (quite common with beaming devices), I’m sure you would read from my previous post why beaming devices (thermostats, locks etc) can suffer from mesh issues even if they’re sitting in front the hub. FAQ: why would I need another beaming repeater if my zwave lock is already close to my hub?
- You can wait for a few days and see how it behaves. If it happens again but at a different time of the day/night then it’s likely the first point. However if it happens at the same time/schedule everyday it’s likely a setting in the app (e.g. folks forget to select a remote sensor / incorrect settings etc)
- There’s another app which is overriding the settings of the thermostat/causing a conflict. This one is easy to figure out, if you click on the SmartApps tab under your thermostat device page it’ll show all the SmartApps that are controlling/using the thermostat
These are starting points but likely you’ll have observe it over a period of time to narrow it down