Netherite armor does not reduce vertical knockback dealt from players

The Bug:

Netherite armor does not reduce vertical knockback dealt from players.

A full set of netherite armor has a chance not to deal any knockback at all, so it could take multiple attempts to reproduce this issue.

Steps to Reproduce:

1. Equip a full set of netherite armor.
2. Get a player to attack you with a knockback attack.
3. Take note as to whether or not netherite armor reduces vertical knockback dealt from players.

Observed Behavior:

Netherite armor does not reduce vertical knockback dealt from players.

Expected Behavior:

Netherite armor would reduce vertical knockback dealt from players.