Itemviews: disappearing items with "internal move" drag'n'drop mode

#include <QtWidgets>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QListWidget list;
    list.setDragEnabled(true);
    list.setDropIndicatorShown(true);
    list.setDragDropMode(QAbstractItemView::InternalMove);
    for (int i = 0; i < 10; ++i) {
        list.addItem(QString::number(i));
        list.item(i)->setFlags(Qt::ItemIsEnabled | Qt::ItemIsSelectable | Qt::ItemIsDragEnabled);
    }
    list.show();
    return app.exec();
}