IOS7 Game Center not showing banner achievements

I am running an ap on iOS 7 with unity 4.2. I have set up the itunes connect and have IAP and Achievements. I can show the achievementUI, the problem is that I don’t see the banner telling the player they have completed an achievement.

If I show the achievementUI, it does show that I have just completed it but no banner appeared.

I have GameCenterPlatform.ShowDefaultAchievementCompletionBanner(true); which is called after I have reset all the achievements(testing) and called LoadAchievements ( but not received the call back)

I have not tried it on ios6

Is there something I have not setup correctly either in the itunes connect or the code?

Having the same issue, it appears to be a common problem (I am using iOS Native Plugin). Seems its something wrong in the OS 7 in sandbox. This thread says that in production everything works OK.

http://forum.unity3d.com/threads/201498-IOS7-and-Game-Center-Achievements-no-banners-displayed