Sonic boom ignores enchantments made to counter it

Steps to reproduce:

1. Download the attached datapack
2. Run

   /enchant @s draft:magic_protection 4

   while holding a piece of armor

3. Summon a warden and wait for it to use a sonic boom

Observed result:
The damage from the sonic boom is fully taken
 
Expected result:
The damage from the sonic boom would be partially blocked