Unexpected Slide Animation

Unexpected Slide Animation

The reverse slide animation looks totally different when i start the application from the iphones/ios6 homescreen instead starting the app from safari. In fact both animation look a little wrong.
But the animation in the homescreen-scenario is strange somehow. I would like to know what the reason for that jqm-animations are depending on the start-scenario?

It only seems to ba a problem with jqm 1.2 final and ios.