ListView does not show all item with VisualDataModel/QFileSystemModel

When a ListView is assigned a VisualDataModel that has a QFileSystemModel, not all child items are shown.

Test case attached. I exposed the QFileSystemModel in C++. It works fine with QDirModel. The code also creates a QTreeView. If you click in the QTreeView, you will see that the QML view updates itself. I am guessing, there is a missing fetchMore() in QML's VisualDataModel code.