Matter dynamic collision error

Phaser 3
2

It may help to assign a new collision category when the pointerdown function is called. Something like:

cat1= this.matter.world.nextCategory();
cat2= this.matter.world.nextCategory();

platform = this.matter.add.rectangle(100, 46, 40, 10, {
		isStatic: true,
	});

ball = this.matter.add.circle(100, 8, 6, {
		isStatic: true
	});

platform.setCollisionCategory(cat1);
ball.setCollisionCategory(cat2);
ball.setCollidesWith(cat2);

this.input.on("pointerdown", function() {
		ball.setStatic(false);
		platform.setCollisionCategory(cat2);
      });