Alarm.com Temperature Sensor keeps unpairing

If a schedule is enabled for a thermostat, the Temperature Sensor would need to be paired for all desired heating and cooling intervals in order to stay connected. If it is not paired for an interval, it will unpair when that next scheduled interval occurs. It will then re-pair when the next scheduled paired interval occurs. 

To pair the Temperature Sensor with a thermostat schedule, see Adding Temperature Sensors to thermostat schedules.