JTable has inconsistent design between different themes

[ghost]

Dear Friends,

I've come to realize that the JTable component isn't fully consistent and stable between different themes.

I'm not entirely sure of how I could describe the issue but here's a GIF of what I've been able to recreate:

(Please ignore the low quality of the GIF)

I'm not allowed to show the production code here but this is the single-method example that I used for the GIF:

public final class FlatLafTableIssue {
	
	public static void main(final String... args) {
		{
			FlatLightLaf.setup();
			UIManager.put("TitlePane.unifiedBackground", false);
		}
		
		boolean dark[] = new boolean[] { false };
		
		final JFrame frame = new JFrame();
		frame.setSize(680, 400);
		frame.setTitle("FlatLafTableIssue");
		frame.setResizable(false);
		frame.setLocationRelativeTo(null);
		frame.setJMenuBar(new JMenuBar());
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
		final JPanel panel = (JPanel) frame.getContentPane();
		panel.setLayout(new BorderLayout());
		
		final JTable table = new JTable();
		table.setModel(new DefaultTableModel(200, 5));
		table.setIntercellSpacing(new Dimension(1, 1));
		table.setShowHorizontalLines(true);
		
		final JPanel tablePanel = new JPanel(new BorderLayout());
		tablePanel.setBorder(BorderFactory.createEmptyBorder(20, 20, 5, 20));
		tablePanel.add(new JScrollPane(table));
		
		final JButton button = new JButton();
		button.setText("Toggle");
		button.addActionListener((event) -> {
			dark[0] = !dark[0];
			FlatAnimatedLafChange.showSnapshot();
			
			FlatLaf.setup(dark[0] ? new FlatDarkLaf() : new FlatLightLaf());
			FlatLaf.updateUI();
			
			FlatAnimatedLafChange.hideSnapshotWithAnimation();
		});
		
		final JPanel buttonPanel = new JPanel(new BorderLayout());
		buttonPanel.setBorder(BorderFactory.createEmptyBorder(5, 20, 20, 20));
		buttonPanel.add(button);
		
		panel.add(tablePanel);
		panel.add(buttonPanel, BorderLayout.SOUTH);
		
		frame.setVisible(true);
		
	}
	
}

I used FlatLaf-3.2.1 and FlatLaf-Extras-3.2.1 as well, but the Issue is also replicable without the usage of the FlatAnimatedLafChange class that is provided by the FlatLaf-Extras module, I only used it for the smooth switching between themes. I also tried out the same example with the FlatTable component provided by FlatLaf-Extras but nothing changed. Everything has been compiled using Java 21.

Here's a ZIP archive that contains the .jar file used for the example (If you don't want to compile it yourself):
FlatLaf-3.2.1-Table-Issue.zip

You can run the .jar it with

java -jar FlatLaf-3.2.1-Table-Issue.jar

or just by double clicking the file (If you have Java installed)

[ghost]

Found out that this issue is related to #733

[DevCharly]

yes, same as #733

fixed in latest 3.3-SNAPSHOT: https://github.com/JFormDesigner/FlatLaf#snapshots