Multiple Issues. 
1. When the Librarian is holding out his glass trade, his whole body and the door behind him turn invisible.

2. The Wardering Trader's arms' sometimes goes into his body.

3. Villagers disappear. This has happened before, and one of those cases the Villagers were in a Village (made by me), had a workstation and have been traded with to max level, and were named.

(bonus)
4. It might of been fixed but the Minecraft Logo disappears and breaks the game a little.  

5. Tridents can hit the Ender Dragon as a projectile while it’s at the center, where it shouldn’t.