I am currently building an iOS app with the latest SAB on my mac. I currently have this title issue where instead of displaying ‘Kitab Taurat’ it is displaying Book_Group_Kitab_Taurat.
In the tree hierarchy to the left of the information you gave above for a particular book, click on the folder one level higher. This should be the level right below the main Books folder. It’s at that level that you define the group name, in the field “Book Collection Name”. If that doesn’t work, show us a screen shot of your tree hierarchy and the data it contains when it is showing the “Book Collection” tab.