On Iphone 5 IOS 6, playEffect() sometimes does not work after resume from background

i am using Cocohesion (cocos2dx 2.0.3) to play sound effect. But in iphone 5 IOS 6, when I resume from background, sometimes the play effect does not work. Anyone has any idea?

Push…

I assume that a lot of people will face this problem…

I have also been getting this issue. Sound effects which have been preloaded, will not play after going background->foreground. Sometimes in the first go sometimes after multiple goes.

Platform: iOS
Platform Version: iOS 6.1
Device: iPad 2, iPad 3
Cocos2d-x Version: 2.1.0
Audio Format: mp3

i have the same problem, the cocos2d-x version is 3.13.