Chiseled Bookshelves cause redstone components to remain on after book has been taken out.

Steps to Recreate:

1. Get a Chiseled Bookshelf
2. Place Redstone Comparator behind Chiseled Bookshelf
3. Place Redstone Lamp or other Redstone Component behind Redstone Comparator
4. Insert any type of Book into Chiseled Bookshelf
5. Notice how the Redstone Component connected to Redstone Comparator fails to turn off