The enchantment animation does not cover an entire held item, the side that is only seen when held does not have the propper annimation.
How to Reproduce:
Hold an enchanted item and look at the edge.
Linked issues
Comments 2
Duplicate of MC-9173, please use the search function to see if your bug has already been submitted. Currently over 55% of tickets are being closed as duplicate.
this is more an feature request than a bug.