QML ToolTip overrides given x/y

import QtQuick
import QtQuick.Controls

Window {
    width: 400
    height: 400
    visible: true
    title: qsTr("Example")

    MouseArea{
        id: mouseArea
        x: 100
        y: 100
        height: 300
        width: 300
        hoverEnabled: true
        acceptedButtons: Qt.LeftButton

        ToolTip{
            id: toolTip
            x: mouseArea.mouseX
            y: mouseArea.mouseY
            visible: true
            text:   "ToolTip: " + Math.round( x ) + " / " + Math.round( y ) + "<br>"
                +   "Mouse: " + Math.round( mouseArea.mouseX ) + " / " + Math.round( mouseArea.mouseY ) + "<br>"
                +   "____________________"
        }
        Rectangle{
            anchors.fill: parent
            color: "lightgreen"
        }
    }
}