I've been experiencing the same problem for a few weeks as well. It would be slow, but would eventually sync. However it seems to have gotten worse. Right now, I've been trying to sync for over an hour now without it completing. It eventually stops trying to sync, but hasn't updated the steps or sleep. In what may or may not be a related problem, I've repeatedly tried to manually add in a nap it didn't detect and it keeps taking it, but then it disappears a few minutes later. I have tried closing the app and going back in, even shutting down my phone altogether and booting back up. Nothing helps. Definitely annoying.
