multiply-dmg-received does not seem to work correctly

[csorrows]

Is your feature request related to a problem? Please describe. multiply-damage-received does not work as I understand it should. Say, if you do 30 dmg to a stack of mobs with 10 hearts each, it should kill 3 of them, but it does not. It seems once you do enough damage to kill one of them, the whole stack dies.

Describe the solution you'd like It should kill the amount of mobs according to the amt of damage dealt.

Describe alternatives you've considered I tried kill-step but it only kills one mob at a time no matter how high your damage is.

Additional context I'm using version 2.2.18. I know it's a legacy version but a lot of servers run on 1.12 and viaversion/viabackwards.