My radiators start heating when the schedule is set at "OFF"
Recently several of my tado radiator thermostat start calling for heat when the time schedule has been set to "OFF". I have noticed that it happens on upstairs radiators during the afternoon and more recently early in the morning between 2am-3am. During this time all the radiator thermostats are set to "OFF". Has anyone experienced this or give an explanation on why this would be happening? I have only had the system for 2 months and these random switch on/off are giving me a headache.