Why I cannot display any graphic on the watch face?

I am building a watch face and I was testing the Graphics dc class, following this documentation: https://developer.garmin.com/connect-iq/api-docs/Toybox/Graphics/Dc.html

I managed to display on the watch the time, date and other fields. The issue is when I am trying to display a circle/rectangle or any graphic. I tried by adding the basic code to the update method:

```

    // Update the view
    function onUpdate(dc as Dc) as Void {
    dc.setColor(Graphics.COLOR_RED, Graphics.COLOR_BLACK);
    dc.fillCircle(50, 100, 75);
...
      // Call the parent onUpdate function to redraw the layout
       View.onUpdate(dc);
}

```

But this doesn't add anything to the display. After displaying the time and the circle, I only get the time to show:

Am I missing something? Should I add some more properties/strings/anything else to display a circle/rectangle on the device? The minApiLevel I am using is 2.1.0.