Spilner said:Well if its One you're playing on when they finally sync up they'll have their appropriate time stamps and rebuild streaks.
Otherwise theres nothing inplaceI wouldn't be too sure about that. The achievement progress (in the app) isn't moving at all. Achievements aren't saying "done, unlocking..." like the other times achievements have gone down.
You might wanna try earning an achievement on 360/Win10/WP8.1 to keep any streak going.