This seems as a very serious regression bug in Qt 6.2.0 on macOS. When I run the following code and when the focus is in the line edit and I press Escape key, nothing happens. No output is printed out.

If I do the same in Qt 5.15.2, text is printed indicating that Escape key has been pressed. When I try the same with Qt 6.2.0 in Windows, it also works well.

Note: The same problem is with QTextEdit and QPlainTextEdit. Other widgets may also be affected, though I have not tested them.

#include <QApplication>
#include <QLineEdit>
#include <QDebug>

class Widget : public QLineEdit
{
protected:
    void keyPressEvent(QKeyEvent *event) override
    {
        qDebug() << "key pressed" << event;
    }
};

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Widget w;
    w.show();
    return a.exec();
}