[TIMOB-18930] ios: ti.map zoom only works the first time

I wanna zoom to a high detail level, but it is only working once per app launch. For more details read my post,[http://developer.appcelerator.com/question/182415/timap-max-zoom-level-on-ios] To repdorduce checkout my git example at [https://github.com/MichelBahl/ExampleIncorrectZoomBehavior]