HoverHandler: sometimes point.position returns (0, 0)

import QtQuick 2.15
import QtQuick.Window 2.1
import QtQuick.Controls 2.15
import Qt.labs.qmlmodels 1.0

Window {
    id: root
    width: 800
    height: 600
    visible: true
    visibility: Window.AutomaticVisibility

    Rectangle {
        anchors.fill: parent

        HoverHandler {
            onPointChanged: {
                var pos = point.position
                if (pos === Qt.point(0, 0))
                    print("hover position is 0, 0!")
            }
        }

        TapHandler {
            onTapped: contextMenu.popup(point.position)
        }

        Menu {
            id: contextMenu
            modal: true
            MenuItem { text: "Foo" }
            MenuItem { text: "Bar" }
            MenuItem { text: "Baz" }
        }
    }
}