If the armor has a high level of thorn enchantment, the durability of the armor will wear out abnormally quickly, no matter how high the unbreakable level is.

Steps of reproduce

1. Enchant 32767 level of thorn and unbreaking on a armor
2. Wear the armor
3. Be attacked by mobs

Expected results

The armor wears out slowly.

Observed results

The armor wears out very quickly.