QML Profiler shows double amount of Repeater delegate Create calls

import QtQuick 2.9
import QtQuick.Window 2.2
import QtQuick.Controls 1.4
import QtQuick.Layouts 1.3

Window {
    id: root
    visible: true
    width: 640
    height: 480
    title: "Completed components: " + completedCount
    property int completedCount: 0

    ColumnLayout {
        anchors.fill: parent
        Repeater {
            model: 100000
            delegate: Rectangle {
                width: 100
                height: 5
                color: "black"

                Component.onCompleted: {
                    ++root.completedCount;
                }
            }
        }
    }
}