spell_amplifier behavior doesn't work on hunger

Release_809752 from 1.2.13

Summary: Modified Husk with BP to increase hunger effect.

Impact: I wanted a husk hunger to do crazy hunger damage and drain your hunger in a couple of seconds. Being unable to do this means I have to try to think of other work arounds without being able to rely on the behavior pack system we have been graciously provided.

Repro Steps:
1) Edit a husk behavior to make its hits do crazy hunger damage. I have attached a world with resource pack which contains the code to do so.
2) Load up the world.
3) Press the button at the corresponding sign to summon a husk and get hit.

Observed Results: The husk hunger damage looks to be standard and slow unlike the spell effect of the same values when using commands.

Expected Results: The husk should completely drain your hunger.

Video: No
Attached: Repro World /w Behavior Pack included