I discovered two bugs while playing on survival:

Ender Dragon's AI glitches out when you shoot a projectile at him (I personally used a crossbow, and I tested twice);

When you rename a previously turned villager (turned into a zombie i mean), he is able to use any workbench block (such as a stonecutter, or a fletcher table) as his profession block, even if its not his profession (like an librarian using a stonecutter). 

Nice work devs, you're making a great job at polishing the game!