The Bug

There are z-fighting issues in the inside of decorated pot on the top of decorated pot or on the bottom side of decorated pot when some block is placed under it. Placing cauldron above decorated pot makes decorated pot visible from the inside of cauldron (and also caulsing z-fighting). This is visible only from spectator mode on most of block except cauldron, where you can see decorated pot that is placed under cauldron wouthout needing to go into spectator.

Reproduce

1. Place Decorated pot on top/under of dirt block block (or any other solid block)
2. /gamemode spectator
3. fly into the decorated pot