Image in ColumnLayout ignores width and height

import QtQuick 2.15
import QtQuick.Window 2.15
import QtQuick.Layouts 1.15

Window {
    id: mainWindow
    width  : 640
    height : 480
    visible: true

    // No Layout: width and height are respected
    Image {
        width : 50
        height: 50
        sourceSize.width : 100
        sourceSize.height: 100
        source: "circle.svg"
    }

    // In ColumnLayout: Image is drawn at sourceSize; width and height are ignored
    ColumnLayout {
        x: 50
        width: 50
        height: 50

        Image {
            width : 50
            height: 50
            sourceSize.width : 100
            sourceSize.height: 100
            source: "circle.svg"
        }
    }
}