[Scripting] EntityEquippableComponent and its methods: setEquipment, getEquipmentSlot and getEquipment are broken

@minecraft/server 1.6.0-beta

import { EntityEquippableComponent, EquipmentSlot, system, world } from '@minecraft/server';
system.runInterval(() => {
    world.getAllPlayers().forEach(player => {
        /**
         * @type {EntityEquippableComponent}
         */
        const equippable = player.getComponent('minecraft:equippable');
        const slot = equippable.getEquipmentSlot(EquipmentSlot.Offhand);
        console.warn(slot?.typeId ?? 'null');
    });
});

Expected Results:

logs the type of the item in my offhand.

Observed Results:
throws 
TypeError: Unexpected type passed to function argument [0].    at <anonymous> (index4.js:32)
at forEach (native)
at <anonymous> (index4.js:34)
does the same for getEquipment  and setEquipment and for "Offhand" or any of the others it throws a native conversion type error.

//line 34
const slot = equippable.getEquipmentSlot(EquipmentSlot.Offhand);

also entity.getComponent("equippable"); might not work on entities.

import { EntityEquippableComponent, EquipmentSlot, system, world } from '@minecraft/server';
world.getDimension(MinecraftDimensionTypes.overworld).getEntities().forEach(entity => {
        if (entity.typeId !== 'minecraft:skeleton') return;
        console.warn(entity.typeId);
        /**
         * @type {EntityEquippableComponent}
         */
        const equippable = entity.getComponent('minecraft:equippable');
        const slot = equippable.getEquipmentSlot(EquipmentSlot.Mainhand);
        console.warn(slot?.typeId ?? 'null');
    });
});

For a skeleton:

Expected Results:
logs 'minecraft:bow'.

Observed Results:
throws
TypeError: cannot read property 'getEquipmentSlot' of undefined at <anonymous> (index4.js:42)
at forEach (native)
at <anonymous> (index4.js:44)

//line 42
const equippable = entity.getComponent('minecraft:equippable');