Spyglass z-fights when being held by wither skeleton

Summary
When wither skeleton holds a spyglass, the texture z-fights with the skeletons' hand.

Step to Reproduce
1. Spawn a wither skeleton
2. Do this command
/replaceitem entity @e[type=minecraft:wither_skeleton] slot.weapon.mainhand 0 spyglass
3. Pay attention to the hand.
---> ❌ The spyglass z-fights with the wither skeletons' hand.