mouseArea hover behavior interferes with tooltips

I'm trying to add tooltips to toolbuttons but the mousearea hover is somehow interfering.

here is the qml that shows the problem:

Code:

---

import QtQuick 2.2
import QtQuick.Controls 1.1
import QtQuick.Layouts 1.1
 
Rectangle {
    id: page
    width: 600
    height: 540
    border.color: "#494646"
    visible: true
 
 
    MouseArea {
        id: mouseArea1
        hoverEnabled: true
 
        anchors.fill: parent
 
        Flow {
            id: vflow
            flow: Flow.TopToBottom
            anchors.fill: parent
 
            spacing: 12
 
 
            Item {
                id: header
                width: 600
                height: 96
 
 
                Image {
                    id: headerbkg
                    anchors.right: parent.right
                    anchors.rightMargin: 1
                    anchors.left: parent.left
                    anchors.leftMargin: 1
                    anchors.top: parent.top
                    anchors.topMargin: 1
                    sourceSize.height: 96
                    sourceSize.width: 480
                    source: "g_header.png"
                    fillMode: Image.PreserveAspectCrop
                }
 
                Flow {
                    id: flow1
                    width: 600
                    anchors.top: parent.top
                    anchors.topMargin: 4
                    anchors.right: parent.right
                    anchors.rightMargin: 4
                    spacing: 10
                    layoutDirection: Qt.RightToLeft
 
                    ToolButton {
                        id: tbClose
                        width: 16
                        height: 16
                        iconSource: "ic_close_16x16.png"
                        scale: maClose.containsMouse ? 1.1:1.0
                        smooth: maClose.containsMouse
                        MouseArea
                        {
                            id: maClose
                            anchors.fill: parent
                            anchors.margins: -10
                            hoverEnabled:true
                            onClicked: Qt.quit()
                        }
                    }
 
                    ToolButton {
                        id: tbSettings
                        iconSource: "ic_settings_16x16.png"
                        width: 16
                        height: 16
                        scale: maSettings.containsMouse ? 1.1:1.0
                        smooth: maSettings.containsMouse
                        MouseArea
                        {
                            id: maSettings
                            anchors.fill: parent
                            anchors.margins: -10
                            hoverEnabled:true
                        }
                    }
 
                    ToolButton {
                        id: tbConnect
                        iconSource:"ic_connect_16x16.png"
                        width: 16
                        height: 16
                        scale: maConnect.containsMouse ? 1.1:1.0
                        smooth: maConnect.containsMouse
                        MouseArea
                        {
                            id: maConnect
                            anchors.fill: parent
                            anchors.margins: -10
                            hoverEnabled:true
                        }
                    }
 
                    ToolButton {
                        id: tbCalculate
                        iconSource: "ic_calculate_16x16.png"
                        width: 16
                        height: 16
                        tooltip: "calculate"
                        scale: maCalculate.containsMouse ? 1.1:1.0
                        smooth: maCalculate.containsMouse
                        MouseArea
                        {
                            id: maCalculate
                            anchors.fill: parent
                            anchors.margins: -10
                            hoverEnabled:true
                        }
                    }
 
                }
            }
        }
    }
}

---