A Block That Has An Entity Bound To It e.g Enchantment Table
Can Be Broken To Remove The Entity e.g Book
In The New Snapshot Sometimes After Breaking These Blocks The Entity's Stay Behind And, For Example A Book, Just Sits There Floating.

What I Expected To Happened Was...
The Entity To Disappear With The Block It Was Bound To

What Actually Happened Was...
The Entity Stayed Behind

Steps To Reproduce
1.Put Down An Enchantment Table
2. Log Out
3. Log Back In
4. Break Enchantment Table