Summary:
When the anti-aliasing is adjusted, the enchantment glint for mob heads and shields is displayed incorrectly in the inventory.
Steps to Reproduce:
Obtain a mob head and shield
Enchant both items
Go to Settings > Video and adjust the anti-aliasing
Look at the enchantment glint for the mob head and shield in the inventory
Notes:
Reloading the world fixes the issue.
This issue seems to be affected by the renderdragon engine.