Netherite armor displayed as an equipment model (such as from being worn by a player or an armor stand) coats the entity in diamond armor instead. This is in comparison to other armor types which appear correctly on the entity.
Steps to reproduce
1. Put on netherite armor
2. Switch to a third-person perspective
3. Observe that the netherite armor appears as diamond armor instead
Linked issues
is duplicated by 12
7 more links
Also applies to armor stands.