Summary:
When an armor stand is in a certain pose, z-fighting occurs on its shoulders.

Steps to Reproduce:

1. Place an armor stand
2. Change the armor stand's pose once
3. View the armor stand from above
4. Move the camera around

Observed Results:
Z-fighting occurs.

Expected Results:
No z-fighting.

Video:
Minecraft 2021-06-02 07-58-24.mp4
^{Keyword for search: armour}