I'm in a build of 360 game. I set up a pause screen with back button. The game continues in the background after pressing "Pause" Enemies continues to move. Background continues to scroll. I am still able to fire and direct weapon trajectory. Music continues. When I hit "back" button, music loop restarts. Message "tap to Move" appears like at the start of the game. Actions that were happening behind the pause screen continue.
There are some issues with Back, not sure if that is the case here. BB2 does not work properly here when connecting a single UI to multiple other UI (or World) nodes. We are in the process of fixing the node linking to support the Back button (and a few others) in all linking situations.