Bugs Update I found the following bugs:

 
Note: Use google translator so there may be errors and sorry for the photos because I play on xbox but I guess they are still multiplatform.

1.The animation of shields, crossbows, pitchforks and bows is incorrect.
2. Witch houses spawn many witches.
3. There is a bugged item in the creative inventory until the end of the redstone.
4.The desert and jungle temples do not spawn chests.
5. Clouds can change their texture and are at y 128.
6. No mobs spawn in the mountains
7. The union of old mounts is incorrect (I think).
8. The glossy frame has the wrong texture and when broken it loosens a normal one.