MapCircle rendering glitch

Hi,

I am using the following code to render a list of position with an effect on radius.
When the model "gpsTrace" have a length equals to 30, the radius is 0.5333333333333333 and produce a rendering glitch. The attached picture show the glitch.


MapItemView {
            model: gpsTrace
            delegate: MapCircle {
                center {
                    latitude: latitude
                    longitude: longitude
                }
                radius: 1.5 - 1.0 * index / gpsTrace.rowCount() // Bug when radius = 0.5333333333333333
                color: Qt.lighter("red", 1 + 0.9 * index / gpsTrace.rowCount());
                border.width: 1
            }
}