Chiseled Bookshelf NBT not showing

When I Ctrl + Right Click on a Chiseled Bookshelf that has 6 books, I get one that says NBT+, but when I place it, it doesn't show any of the books. When I break the Chiseled Bookshelf, all 6 books drop.

*For some reason, the screenshots aren't in order, the order is 3, 1, 2, 4