I have had my CT100 installed and have used ST to control it for at least three years with no issues. In the last week the thermostat suddenly started going into off mode at random times. Sometimes it happens once and then operates normally for a few days before doing it again. Today it turned itself off twice. It has happened both when people are present and when the house is in away mode.
I typically use Webcore to control the temperature setpoints. Also, this thermostat only controls my heat. I have a virtual switch that I turn on during heating season that triggers all the other pistons. It is the only pistons that is setup to command the thermostat to turn off. I have not touched the switch since October.
The activity feed for the thermostat does not show that any command was sent. It will just read thermostat off. I have been having some trouble with my Lifx bulbs in Webcore recently, but I am not sure if that is related. Any advice would be greatly appreciated.