A bug? fillcolor and fillAlpha cannot be set correctly by this.add

For example:

let line = this.add.line(null, null, 500, 500, 800, 400, 0xff0000 , 1);
    //circle([x], [y], [radius], [fillColor], [fillAlpha])
    let circle = this.add.circle(200, 200, 50, 50, 0xff0000, 1);
    //circle.fillAlpha = 1;
    //circle.fillColor = 0xff0000;
    circle.isStroked = true;
    circle.strokeColor = 0xff0000;
    console.log(circle);

I get something like this

The circle arguments look wrong.

Oh, sorry. I did’n notice that I gave it too many arguments.