When i have epic fight mod installed this happens to the griefer armor form savage & ravage
Only with this armor i alredy tested other armors from other mods in my modpack and only this one have this bug
Edit:

(in the inventory the armor looks normal)
Also the version is EpicFightMod-17.0.5.jar
Forge version is 1.16.5-36.2.9
And the savage & ravage version is 1.16.5-3.1.0