JPopupMenu error / failure (?) When displaying submenu

Question

I have this weird error with my popup menu. This happens rarely and, it would seem, randomly. The problem is that when I have a submenu in my JPopupMenu - when I select a submenu, the main menu disappears and the submenu is colored incorrectly (it is similar to how the main menu buffer is colored in a submenu). I can still navigate it using the keyboard.

Here are some screenshots: Here is how it should look like

And here is what the error looks like:

Thus, the glitch in the second image is where the submenu should have been.

What could be the reason for this? There are no exceptions, this does not look like a platform, so I have no idea how to narrow it down. Please, help.

sscce, :

import javax.swing.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

public class Test {
    private static Popup popup;

    public static void main(String[] args) {
        final JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.getContentPane().addMouseListener(new MouseAdapter() {
            @Override
            public void mousePressed(MouseEvent e) {
                showMenu(e);
            }

            @Override
            public void mouseReleased(MouseEvent e) {
                showMenu(e);
            }

            private void showMenu(final MouseEvent e) {
                if (e.isPopupTrigger()) {
                    JPopupMenu menu = new JPopupMenu();
                    JMenu subMenu = new JMenu("SubMenu");
                    menu.add(subMenu);

                    subMenu.add("Item 1");
                    subMenu.add("Item 2").addMouseMotionListener(new MouseAdapter() {
                        @Override
                        public void mouseMoved(MouseEvent e) {
                            hidePopup();
                            // this is where I call the hide twice, in my case it was
                            // caused by some action or mouse listener calling it twice
                            hidePopup();
                            showPopup(e, frame);
                        }
                    });
                    subMenu.add("Item 3");

                    menu.show(frame.getContentPane(), e.getX(), e.getY());
                }
            }

            private void showPopup(MouseEvent e, JFrame frame) {
                PopupFactory popupFactory = PopupFactory.getSharedInstance();
                JToolTip toolTip = new JToolTip();
                toolTip.setTipText("wfkwdlpfhd ");
                popup = popupFactory.getPopup(frame, toolTip, e.getXOnScreen(), e.getYOnScreen());
                popup.show();
            }

            private void hidePopup() {
                if (popup != null)
                    popup.hide();
            }
        });

        frame.setSize(300, 300);
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }
}

Answer 1

, .

- , - : JProgressBar, , . Popup PopupFactory. , , . hide() null, hide() , gc - . , -, JPopupMenu.

Popup.hide() JavaDoc :

Popup. , . Popup PopupFactory. , , .

Answer 2

, , :

table.setComponentPopupMenu(popup);