странное поведение свойства visible в Image

Здравствуйте!

Image {
        id: highBeam
        source: "qrc:/icons/HighBeam.png"
        visible: main.sourceData[8]
    }

import QtQuick 2.10
import QtQuick.Window 2.10
import QtQuick.Layouts 1.3

Window {
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")

    property var myArray: [1, 0, 9]

    ColumnLayout {
        anchors.fill: parent
        Rectangle {
            color: "red"
            visible: isVisible((myArray[0]))
            width: 50
            height: 50
        }

        Rectangle {
            color: "green"
            visible: isVisible((myArray[1]))
            width: 50
            height: 50
        }

        Rectangle {
            color: "whitesmoke"
            visible: isVisible((myArray[2]))
            width: 50
            height: 50
        }
    }

    function isVisible(value)
    {
        return value > 0;
    }
}