QMessageBox: bad rendering if default button is not given as input

Given the following:

QMessageBox::warning(this, "Error", "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod", QMessageBox::Yes | QMessageBox::No, QMessageBox::NoAll);

Since QMessageBox::NoAll is not in the QMessageBox::StandardButtons given as input the result is as follows:

IMPO, if default button is not part of the buttons given, then default to one of them.