Using the attached menu_test.qml shows two menus at the bottom of the application.
The left menu clears the listmodel and appends four items. The view shows at one item above where is expected.
The right menu is populated only by the ListElement. It shows as expected.

This can be rectified by using menuView.positionViewAtIndex(0,ListView.Beginning); after appending the items, but this should not be necessary.

Clicking on the application pull up both menus. Again, the left menu shows at one item above where is expected.