@SGaist yeah, it's kinda crystal ball, but at least I had no code which could provide more information than given above. ^^

@mrjj You nailed it. That thing solved the topic in a very smooth way. thumbs.up

Kind regards,
Mike

#include <QProxyStyle>
class MyStyle : public QProxyStyle {
  virtual QRect subElementRect(SubElement subElement, const QStyleOption*opt , const QWidget* widget) const override {
    if ( subElement == SE_RadioButtonClickRect && widget)
      return widget->rect();
    else
      return QProxyStyle::subElementRect( subElement,opt,widget) ;
  }
};


ui->radioButton->setStyle( new MyStyle );

Can you show your code ? Without it it's pretty much "Crystal Ball Debugging".