Sound issues fixes for iOS 10 Push Notifications

Question

I’ve implemented push notifications for our app.

on iOS 9, the sound words fine. on iOS 10, it’s very unpredictable. Fresh install from Xcode on iOS 10.0.2 would bring u

Answer 1

Has Apple completely fixed this issue in any version? If so what version?

Based on JAL's comment Apple has fixed in iOS 10.2.

After a hard reboot, would the problem completely go away? Or you need to do it again? if so when?

Based on leontx's comment, For those users who are using iOS 10.0.x or 10.1.x they would only need to do a single hard reset.