In SAB 4.6.1, there is a new feature in the “Chapter and Verse Navigation” section which is enabled by default. It is called “Show chapter selector immediately after the user selects a book”.
There is a bug in the iPad implementation such that when you select the book, then nothing happens (even the book is not selected). There was a user who attempted to submit an iOS app built with 4.6.1 and it was rejected for this.
The work-around is to deselect this feature before building your app. With this feature deselected, it should behave as it did in the previous release of SAB.
This is fixed and will be available in the next version of SAB.