Some additional data, for what it’s worth. My Fuze+ clock updates while it’s on, but when I first turn it on, it always shows the time I entered the last time I set it. The clock doesn’t actually run backwards; it just appears to because it reverts to the last set time when I turn it on. I’ve tried resetting it (long on/off switch push) and reinstalling firmware 02.36.03, but that doesn’t change the time-tracking behavior.