Iron golems ignore their custom behavior and will attack hostile mobs even if they're not supposed to.

Partner Rank: 3

Verification builds: Beta 1.12.0.4 release 2160393

Summary: Iron golems ignore their custom behavior and will attack hostile mobs even if they're not supposed to.

Impact: Behavior modifications that dont work as they should causes problems with development including halting of projects all together.

Repro Steps:
1. download the attached "monster bug world"
2. summon a half dozen iron golems on the green side
3. summon a half dozen zombie on the same green side
4. wait, can sometimes take a little while

Observed Results: An iron golem will attack a zombie

Expected Results: In the behavior pack, the iron golem is not supposed to attack the zombie as they both have the family "good" and should only attack family "bad"

Screenshots/Videos attached:  World is attached.

Regression builds: never worked, at least since 1.2