QRadioButton autoExclusive is broken when parent widget of the buttons has a child widget which also contain radio buttons

Consider the following:

In Designer, you create a QGroupBox and insert QFrame widgets, insert QRadioButtons inside the frames and insert QRadioButtons in the QGroupBox. If you follow this order, the exclusivity of the QRadioButtons outside the QFrames will not be respected.

Note that a workaround is to add the buttons into QButtonGroups and let the QButtonGroups handle the exclusiveness of the buttons.