Strange behavior of return press when edit text is selected in QComboBox

Consider the following example:

#include <QApplication> 
#include <QComboBox> 
#include <QLineEdit> 

int main(int argc, char **argv) 
{ 
   QApplication app(argc, argv); 

   QComboBox cb; 
   cb.setFixedWidth(200); 
   cb.setEditable(true); 
   cb.addItem(QStringLiteral("Single Entry")); 
   cb.setEditText(QStringLiteral("Second Entry")); 
   cb.lineEdit()->selectAll(); 
   QObject::connect(cb.lineEdit(), &QLineEdit::returnPressed, &app, [&cb]() { qWarning("->%s", qPrintable(cb.currentText())); }); 
   cb.show(); 

   return app.exec(); 
}

Here, a QComboBox is created with an initial single entry. Then the edit text is set to something different and selected.

Observed: On hitting Return you see the  initial single entry printed out on the console and the combobox shows this entry.

Expected: On hitting Return you see the set edit text printed out on the console and the text in the combobox does not change (and perhaps the selection should stay as in a normal QLineEdit).

Fun fact: If you do not select the text, the combobox behaves as expected.