If I have the following: ``` js paddle.anchor.setTo(0.5); paddle.inputEnabled = true; paddle.input.setDragLock(false, true); paddle.input.enableDrag(false, false, false, false, this.game.world.bounds); ``` I can only drag my paddles so far down:  The opposite happens when I drag up: the paddles are able to move beyond the world boundaries by half their height. If I comment out `paddle.anchor.setTo(0.5)` then everything works as expected. Is this a bug in `enableDrag`, or am I supposed to deal with it in my code?