QLineEdit::PasswordEchoOnEdit text deleted on Linux

#include <QApplication>
#include <QStyle>
#include <QWidget>
#include <QFormLayout>
#include <QPushButton>
#include <QLineEdit>

int main(int argc, char *argv[])
{
    QApplication *app = new QApplication(argc, argv);

    QWidget *widget = new QWidget();
    widget->setWindowTitle("QLineEdit::PasswordEchoOnEdit test");
    widget->setMinimumSize(360, 280);

    QFormLayout *form = new QFormLayout(widget);
    QPushButton* btn = new QPushButton();
    btn->setText("Submit");
    btn->setDefault(true);

    // initial text with PasswordEchoOnEdit will be deleted on linux
    //QLineEdit *wid = new QLineEdit("password");

    QLineEdit *wid = new QLineEdit();

    QAction *act = wid->addAction(QApplication::style()->standardIcon(QStyle::SP_ArrowUp), QLineEdit::TrailingPosition);
    wid->setEchoMode(QLineEdit::PasswordEchoOnEdit);

    QApplication::connect(act, &QAction::triggered, [=]()
    {
        if (wid->echoMode() == QLineEdit::Normal)
        {
            wid->setEchoMode(QLineEdit::PasswordEchoOnEdit);
            act->setIcon(QApplication::style()->standardIcon(QStyle::SP_ArrowUp));
        }
        else
        {
            wid->setEchoMode(QLineEdit::Normal);
            act->setIcon(QApplication::style()->standardIcon(QStyle::SP_BrowserStop));
        }
    });

    form->addRow("Username", new QLineEdit());
    form->addRow("Password", wid);
    form->addRow(btn);

    // the issue ie. changing focus
    // calling QLineEdit::setEchoMode text will be deleted on linux
    btn->setFocus();

    wid->setEchoMode(QLineEdit::PasswordEchoOnEdit);
    wid->setText("password");

    widget->setLayout(form);
    widget->show();

    return app->exec();
}