On latest Dev build, - equipslot{slot=<slot>} condition no longer works on 1.20.4

Title. Attribute slots now apply correctly, however this seems to have somehow broken the equipslot condition.

test-item1:
  Id: IRON_SWORD
  Display: 'Sword of Testing'
  Attributes:
    MainHand:
      Damage: 12
      AttackSpeed: -2.4 ADD
  Skills:
  - message{m="In Mainhand!"} @self ~onUse ?equipslot{slot=HAND}