iPad very slow and crashes after using AIR app

Hi!

I am developing an Adobe AIR app for the iPad (I use iPad 4 with iOS 7). The app works fine. However, when I exit the app and use the iPad, the device is very slow and after a while it actually reboots by itself. I am 100% positive that the iPad's behaviour is related to the use of the AIR app. It causes in general some delay to the system and eventually the iPad reboots. I am afraid that would cause my app to be rejected by Apple.

Any ideas?

Cheers