Yep, same issue here. Did a factory reset of the band, but this didn't solve it. Also noticed when I change the background, the app and the band show "synching". When I tap the "sync with band" icon in the app to get the health stats, the app shows synching, but the band doesn't. Not sure it that is how it is supposed to be though. Never paid attention.
Surely looks like DST threw it off somehow