Changing IconImage's iconColor also affects its size

import QtQuick 2.9
import QtQuick.Controls 2.3
import QtQuick.Controls.impl 2.3

ApplicationWindow {
    id: window
    width: 300
    height: 100
    visible: true

    Row {
        anchors.fill: parent
        anchors.margins: 8
        spacing: 20

        Switch {
            id: enabledSwitch
            text: "Enabled"
            checked: true
        }

        IconImage {
            color: enabledSwitch.checked ? "transparent" : "grey"
            source: "qrc:/wifi.png"
            sourceSize: Qt.size(20, 20)
            onWidthChanged: print(width)
        }
    }
}