I’ve had my SBP for about 15 months. I’ve been using it as a UPS the entire time and haven’t changed any connected equipment or the unit’s location the entire time. With the past two weeks the fans speed up and become very loud about twice per hour. The app shows the unit temperature of 39c +/- 1c consistently. I have also kept the unit on sleep/silent mode the entire time. Any ideas why the fan cycling has started all of the sudden?