I think I'm getting what you're trying to do.
You're on screen A, open the Overlay by tapping on icon, and then navigate to screen B.
On screen B you tap the icon again, and are suprised to see just the Overlay. Correct ?
I created a simple setup to test it, but I get it to work quite easily. See the screen below.
And you can test the interactions here. Does this setup resemble your wired protoype ?
