Running a Sencha native package offline !!!

Hi all

I have packaged my app using the native packager from sencha.

If I load my app and turn my internet connection off on my iphone the app starts up offline, but after a couple of minutes if I close the app en start it again, it start showing the splash screen and than the screen turns white and the app doesn't start.

Anyone an idea what could be the problem ?

Thanks in advance