Summary:
3rd person perspective goes through the east and south sides of the cauldron. The camera only gets stuck a little on the top edges of these blocks.

Steps to reproduce:

1. Place cauldron.
2. Look at yourself in third person near the east and south sides of the cauldron.

Observed results:
The camera goes inside the cauldron ignoring the east and south sides.

Expected results:
The camera will not goes through the east and south sides of the cauldron.