createConicGradient startAngle not working

[kakha13]

Tested on iOS

CODE

<StackLayout width="300" height="300" backgroundColor="black">
      <Canvas ref="canvas" style="width:100%; height:100%" width="300" height="300" @ready="onDraw" />
</StackLayout>

    canvas = args.object
    ctx = canvas.getContext('2d') as CanvasRenderingContext2D;
    canvas.width = canvas.clientWidth;
    canvas.height = canvas.clientHeight;

    const gradient = ctx.createConicGradient(90, canvas.width/2, canvas.height/2);

    // Add five color stops
    gradient.addColorStop(0, 'red');
    gradient.addColorStop(0.25, 'orange');
    gradient.addColorStop(0.5, 'yellow');
    gradient.addColorStop(0.75, 'green');
    gradient.addColorStop(1, 'blue');

    ctx.fillStyle = gradient;
    ctx.fillStyle = gradient;
    ctx.fillRect(20, 20, canvas.width, canvas.width);

Nothing changes