With Public Beta 4.5b37 and completing a Wi-Fi sync, it still says, "Not synced". I deleted and reinstalled the app, but the problem still remains.
Sorry for the trouble you're running into @1puburap. We're still working all the kinks out of the new syncing stuff. Keep your eye on the release notes in our next few betas.
With Version 4.5b39 WiFi-syncing seems to work fine.
Excellent news, @1puburap, thank you for the update!