Polygon graphics bounds

[lozog]

Hello.
I have an Actor and I'm defining a Polygon to use for its graphics. The points I use for the Polygon make a hexagon shape.
See below:

const SIDE_LENGTH = 25;
class Tile extends Actor {
  constructor(x: number, y: number) {
    super({
      x, y, color: Color.ExcaliburBlue
    });
  }

  public onInitialize() {
    const hexagon = new Polygon({
      points: [
        vec(-1, Math.sqrt(3)).scale(SIDE_LENGTH),
        vec(1, Math.sqrt(3)).scale(SIDE_LENGTH),
        vec(2, 0).scale(SIDE_LENGTH),
        vec(1, -1 * Math.sqrt(3)).scale(SIDE_LENGTH),
        vec(-1, -1 * Math.sqrt(3)).scale(SIDE_LENGTH),
        vec(-2, 0).scale(SIDE_LENGTH),
      ],
      color: this.color
    });
    this.graphics.use(hexagon);
  }
}

The bounds of this Actor don't follow the polygon's shape, but rather a rectangular bounding box around the shape (highlighted below in red):

I was able to resolve this by defining a PolygonCollider with the same points used for the Polygon and setting useGraphicsBounds to false:

constructor(x: number, y: number) {
    const hexagonCollider = new PolygonCollider({
      points: [
        vec(-1, Math.sqrt(3)).scale(SIDE_LENGTH),
        vec(1, Math.sqrt(3)).scale(SIDE_LENGTH),
        vec(2, 0).scale(SIDE_LENGTH),
        vec(1, -1 * Math.sqrt(3)).scale(SIDE_LENGTH),
        vec(-1, -1 * Math.sqrt(3)).scale(SIDE_LENGTH),
        vec(-2, 0).scale(SIDE_LENGTH),
      ]
    });
    super({
      x, y, color: Color.ExcaliburBlue, collider: hexagonCollider
    });
    this.pointer.useGraphicsBounds = false
  }

My question is, is this expected? My understanding of useGraphicsBounds from the docs would suggest that if useGraphicsBounds is true, then it should use the bounds of the Polygon (without needing to define a collider explicitly).

Thanks!