hover events can't be propagated from a MouseArea to a QQuickItem

I work on an application having a 3D view that need catch all mouse events to be able to manage drag and drop, highlighting,...
This 3D view is a QQuickItem that re-implement mouse*Event(QMouseEvent* event) and hover*Event(QHoverEvent* event) methods.

Our GUI is build in QML on top of the 3D view.

I have implemented a ToolTip Item that is derived from a MouseArea. This MouseArea is over every other elements (out of the tree where the picking is done).

All buttons works well, but the view 3D doesn't receive the hover events.
I am expecting that refusing the PositionChanged event allow hover events to be propagated.

We use hover events in the 3D view to highlight objects.

Main part of the ToolTip implementation:

MouseArea {
    anchors.fill: parent

    hoverEnabled: true
    preventStealing: false
    propagateComposedEvents: true

    onPressed: {
        mouse.accepted = false  // Fix lock of other MouseArea under this one
    }

    onPositionChanged: {
        mouse.accepted = false

        ...
    }
}

I don't want put my tooltip component in all our menus to reduce the number of items and code complexity.