crash when load plist in new scene and load amazon ad.


I create a game for android use c++ cocos2dx.
I add Amazon AD in the game. But I fount the game crash when turn to second scene. And frequently crash.
I use cocos2dx 2.1.4

1.load LOGO scene and wait 2 sec. the same time load Amazon ad.
2.when Amazon ad loaded and turn to second scene. And second scene load plist file in it.
3.It will high rate crash.