Reference Error when looking up global context property

The lowenergyscanner example in QtBluetooth (https://doc-snapshots.qt.io/qt5-5.11/qtbluetooth-lowenergyscanner-example.html) uses a global context property:

Device d;
QQuickView *view = new QQuickView;
view->rootContext()->setContextProperty("device", &d);

During the execution of the example the QML engine returns a ReferenceError:

qrc:/assets/Services.qml:120: ReferenceError: device is not defined

The offending code line is triggered by the following code section:

MouseArea {
    anchors.fill: parent
    onClicked: {
         pageLoader.source = "Characteristics.qml"; //Line 1
         device.connectToService(modelData.serviceUuid); //Line 2
    }
}

If Line1 and Line2 are swapped the reference error disappears. To reach this point of the example execution the following steps have to be taken:

1. start lowenergyscanner
2. click on "Search" (and wait until search complete)
3. click on a BTLE device that you can connect to (and wait until service discovery is done)
4. click on a service in the list

The last click triggers the above connectToService() call.