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I have a new problem(?) with SmartWatch 3: Android Wear in notification center is now saying "Connected, running sync loop", used to be just "Connected". I don't know if it has something to do with this issue or not, but my Z3 has rebooted itself 2 times now in 1 day period and yesterday morning it didn't wake up (didn't wake me up either) and only pressing power + volume buttons shut it down so i could start it up again.
Also today, after random reboot i noticed AVG scanning "Google Play services" and it was after that i noticed this "sync loop". So maybe Google Play services was updated after reboot and it has something to do with this. Everything seems to work fine, notifications, apps, etc, i don't know if this is a problem or some new feature. And i can't tell does this affect battery life yet, i'll see it in the evening.
Resyncing apps, or rebooting SW3 won't make "sync loop" go away.
This indeed seems to affect battery life, or something else is. But i found the solution from this thread https://productforums.google.com/forum/#!topic/android-wear/Dm62UKfemIs, in case someone else is wondering...
The same for me,I found the explanation here.Developer options enabled:
http://www.androidcentral.com/what-does-connected-running-sync-loop-mean-android-wear