Submenu item not correctly aligned in rtl mode (gap to main menu)

A simple submenu does not align correctly when using rtl mode (`-reverse`):

QMainWindow mw;
auto a1 = new QAction("Action 1");
a1->setIcon(QIcon(":/myicon.png"));
auto a2 = new QAction("Act 2");
a2->setCheckable(true);
auto menu = mw.menuBar()->addMenu("Menu");
menu->addAction(a1);
menu->addAction(a2);
auto submenu = menu->addMenu("Sub1");
submenu->addAction(new QAction("Act 3"));
mw.show();

ltr mode:

rtl mode:

rtl mode with vista style:

As you can see it also looks like the menu also needs to be moved some pixels to the right.
Also the '>' arrow in ltr mode seems to be to near at the border (in rtl mode it looks better) - was a problem of my debugging while trying to figure out why there is a gap