Sub app "click-through"

I use Actives as graphical buttons and handle Appstore stuff in a sub app which covers the buttons of the main menu screen. When I tap somewhere in the sub app area, buttons of the main app still work, although they are lying beneath the sub app. Happens only in iOS. Is this a bug or do sub apps work differently in iOS?

Thanks for your report.
This doesn't sound like the correct behavior. I will look into it.

Just updated to Build 254, but the problem still exists. Is it possible to fix this?