FOV condition "rotation" attribute does not appear to function.

MM 5.4.0 28c6b0f1 || Paper 169 (1.20.1)

FOV condition's rotation option does not appear to work. I can't see anything sus in debug and no errors. The tester below is firing all skills when damaging the front of the mob.

Mob

TestDummy:
  Type: Zombie
  Health: 1000
  Skills:
  - skill{s=RearSkills} ~onDamaged
  - skill{s=Side1Skills} ~onDamaged
  - skill{s=Side2Skills} ~onDamaged
  - skill{s=FrontSkills} ~onDamaged

Skills

FrontSkills:
  TargetConditions:
  - fov{a=90;r=0}
  Skills:
  - m{m=FRONT} @trigger

Side1Skills:
  TargetConditions:
  - fov{a=90;r=90}
  Skills:
  - m{m=SIDE 1} @trigger

Side2Skills:
  TargetConditions:
  - fov{a=90;r=180}
  Skills:
  - m{m=SIDE 2} @trigger

RearSkills:
  TargetConditions:
  - fov{a=90;r=270}
  Skills:
  - m{m=REAR} @trigger