iPad Home button not allowing draw frame in Unity?

Hey guys, I'm working on an iPad app, and have an question regarding iOS working with Unity. When I am running the build on an iPad, and press the iPad HOME button twice (which brings up the iPad Apps Bar), it pauses the Unity build. This is normal behavior. My question is, I'd like the Unity app to switch from gameplay to a pause screen. I've messed around for quite a bit, but it seems to me that once the home button is pressed unity will not draw another frame so the pause screen can not be shown...BUT I think I have seen some iPad apps get this to work.

Any information here would be MUCH appreciated! Thanks!