containsMouse on MouseArea glitch on control that display menu

In Qml with a QtQuick controls that display a menu on click (does so with ComboBox, Button with menu, ...), a mouse area that float above the combobox will lose the containsMouse property on menu trigger.

The normal behavior:
Once the mouse cursor is above the blue rectangle the rectangle move to the right. Upon leaving the rectangle surface the rectangle move back to the left. Clicking on the combobox and selecting an input should keep the containsMouse on mouse area as long as the cursor is above the blue rectangle.

Repos step:
If I press the combobox and let the mouse cursor stand still hover the combobox, the blue rectangle will move back to the left. If I click the combobox and quickly move the cursor on the displayed menu, the box will still be on the right, even if the cursor return above the combobox later.

I have attach an example file that display the bug