Describe the bug you're experiencing

Regardless of value set, the health of the mob goes down to a very low value the moment the first summon is killed, instead of working based on the brutalboss version of the mob's base health. This can result in a zombie boss with 400 health returning to 40 health before percent is taken at all.

Reproducability

Create a boss with any entity.
Give it an AI goal with brutalbosses:summonmobs and give that a ownerdamagepct of any value.
Kill any summoned minion from the boss and watch its health get absolutely destroyed.

Mod up to date

• Before submitting this issue I updated to the newest version and reproduced it

Minecraft version

1.16

Modloader version

Forge

Logs and Datapacks

https://gist.github.com/Kaleidio/5bb4b8b19415b4ecc879c290ca8e3f72

Sorry but I'm no longer updating 1.16.5