Title bar appears when minimizing WA_TranslucentBackground & FramelessWindowHint with QWebEngineView

#include <QApplication>
#include <QMainWindow>
#include <QVBoxLayout>
#include <QWidget>
#include <QPushButton>
#include <QWebEngineView>
#include <QScreen>

class MainWindow : public QMainWindow {    
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr) : QMainWindow(parent) {        
        // Set translucent background and frameless window
        setAttribute(Qt::WA_TranslucentBackground);
        setWindowFlags(Qt::FramelessWindowHint);

        // Central widget and layout
        QWidget *centralWidget = new QWidget(this);
        QVBoxLayout *layout = new QVBoxLayout(centralWidget);
        setCentralWidget(centralWidget);

        // Minimize button
        QPushButton *minimizeButton = new QPushButton("Minimize", this);
        connect(minimizeButton, &QPushButton::clicked, this, &MainWindow::showMinimized);

        // QWebEngineView setup
        QWebEngineView *webView = new QWebEngineView(this);
        webView->setHtml("<h1 style='color: white; text-align: center;'>Hello, World!</h1>");

        // Add widgets to layout
        layout->addWidget(minimizeButton);
        layout->addWidget(webView);
    }
};

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

    MainWindow window;
    window.setGeometry(100, 100, 800, 600);
    window.show();

    return app.exec();
}