I am also using IOS app V3.20.0 (20) and the thermostat firmware version 1.2.8 the last time it recorded usage was Aug 17th (didn’t record for 3days), and until I deleted the device and added it back in (because the thermostat was registering OFFLINE), it backfilled the days. But what is odd three other days this week it reported that my AC ran for 24hrs straight for the three days. AND to make things even more frustrating, it won’t add in my sensors!