Invisible (but not quite) pixels on the Netherite sword texture

There are almost invisible pixels on the Netherite sword texture, visible when the sword is enchanted.

What I expected to happen was...:
The sword texture to start shimmering

What actually happened was...:
It did, but with it some pixels above the handle started shimmering too.

Steps to Reproduce:
1. Get a Netherite Sword

2. Enchant it