All collisions are triggered instead of just the one that has the event listener

[KokoDoko]

If I create a Matter physics object, and add a collision event listener, the collision event gets fired for EVERY collision in the world, instead of just the one object that I added the listener to.

this.physicsBox = Matter.Bodies.rectangle(x, y, w, h, options)
Matter.Composite.add(world, this.physicsBox)

this.physicsBox.onCollide((pair) => {
     console.log('Box got hit!', pair.bodyA.label, pair.bodyB.label)         // this logs every collision in the world, even if this box is not part of it.
});