#include <QtWidgets/QtWidgets>

int main(int argc, char *argv[])
{
  //QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // Issue with and without High DPI
  QApplication app(argc, argv);
  app.setStyleSheet("QWidget { font-size : 24pt }"); // Not needed, but worsens the problem.
  QWidget window;
  QHBoxLayout *layout = new QHBoxLayout(&window);
  QString t = "This simple control has a long text to ensure a long length to trigger the problem.";
  layout->addWidget(new QLabel(t)); // QPushButton also shows the problem
  layout->setSizeConstraint(QLayout::SetFixedSize);
  window.show();
  app.exec();
}