ADDITIONAL SYSTEM INFORMATION :
macOs Swing app packaged with jpackage does not show Menu Bar if apple.laf.useScreenMenuBar=true.
This problem does not occur when running the app before packaging.
Problem persists if property -Dapple.laf.useScreenMenuBar=true is asked to be passed at startup.

A DESCRIPTION OF THE PROBLEM :
macOs Swing app packaged with jpackage does not show Menu Bar if apple.laf.useScreenMenuBar=true


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Create a jpackage on macOS and OpenJDK 16 with the provided source code in this form.

Example:
jpackage --input /Users/nicolasdepomereu/Desktop/MenuTest --main-jar /Users/nicolasdepomereu/Desktop/MenuTest/menutest-1.0.jar

(Jar created with Netbeans)

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The "File" menu should display when running the app packaged with jpackage.
ACTUAL -
The "File" menu does not show when running the app packaged with jpackage.

---------- BEGIN SOURCE ----------
package menutest;

import javax.swing.GroupLayout;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;

public class MenuTestFrame extends javax.swing.JFrame {

    public MenuTestFrame() {
        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
                
        JMenuBar jMenuBar1 = new JMenuBar();
        JMenu jMenu1 = new JMenu();
        JMenuItem jMenuItem1 = new JMenuItem();

        jMenu1.setText("File");
        jMenuItem1.setText("New File");
        jMenu1.add(jMenuItem1);
        jMenuBar1.add(jMenu1);
        setJMenuBar(jMenuBar1);

        GroupLayout layout = new GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(GroupLayout.Alignment.LEADING)
            .addGap(0, 400, Short.MAX_VALUE)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(GroupLayout.Alignment.LEADING)
            .addGap(0, 274, Short.MAX_VALUE)
        );

        pack();
    }
   
    public static void main(String args[]) {
        
       System.setProperty("apple.laf.useScreenMenuBar", "true");
             
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new MenuTestFrame().setVisible(true);
            }
        });
    }
}

---------- END SOURCE ----------

FREQUENCY : always