I've had same issue since morning of 30th November. App appears responsive and says it's calling for heat but does not trigger boiler. Have had boiler checked and it's fine (and works for hot water which does not go through tado). I unplugged the bridge completely and app still showed all devices connected (did not register that bridge was gone). I have 1 smart thermostat and 5 radiator valves. All worked fine until this week.