QTextFormat::FullWidthSelection does not work with right-to-left text layout

#include <QtCore/QList>
#include <QtGui/QTextCursor>
#include <QtGui/QTextFormat>
#include <QtWidgets/QApplication>
#include <QtWidgets/QTextEdit>

int main(int argc, char **argv) {
    QApplication app(argc, argv);

    QTextEdit edit;
    edit.setPlainText("فارسی\n\nEnglish\n");
    QList<QTextEdit::ExtraSelection> selections;

    for (int i = 0; i < 2; ++i) {
        QTextEdit::ExtraSelection selection;
        selection.format.setProperty(QTextFormat::FullWidthSelection, true);
        selection.format.setBackground(Qt::yellow);
        selection.cursor = edit.textCursor();
        selections.append(selection);
    }
    selections[1].cursor.movePosition(QTextCursor::NextBlock, QTextCursor::MoveAnchor, 2);

    edit.setExtraSelections(selections);
    edit.show();

    return app.exec();
}