A DESCRIPTION OF THE PROBLEM :
If I Open a new Stage with a SwingNode and close it. The SwingNode stays in the Heap but it isn't reachable anymore.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Open a new Window with the Button
Close the Window with X

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The SwingNode is not reachable anymore and should be disposed
ACTUAL -
The SwingNode stays in the heap and is never disposed

---------- BEGIN SOURCE ----------
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.SwingUtilities;

import javafx.application.Application;
import javafx.application.Platform;
import javafx.embed.swing.SwingNode;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

/**
 *
 */
public class JFXDemo extends Application {

	Stage stage;

	/**
	 * @param args
	 */
	public static void main( final String[] args ) {
		launch( args );
	}

	@SuppressWarnings("restriction")
	@Override
	public void start( final Stage stage ) {
		final SwingNode swingNode = new SwingNode();

		createSwingContent( swingNode );

		final StackPane pane = new StackPane();
		pane.getChildren().add( swingNode );

		stage.setTitle( "Swing in JavaFX" );
		stage.setScene( new Scene( pane, 250, 150 ) );
		stage.show();
	}

	private void createSwingContent( final SwingNode swingNode ) {
		SwingUtilities.invokeLater( new Runnable() {
			@Override
			public void run() {
				final JButton button = new JButton( "Click" );
				button.addActionListener( new ActionListener() {

					@Override
					public void actionPerformed( final ActionEvent e ) {

						final SwingNode swingNode = new SwingNode();

						createSwingContent( swingNode );

						final StackPane pane = new StackPane();
						pane.getChildren().add( swingNode );
						Platform.runLater( () -> {
							new Runnable() {
								@Override
								public void run() {
									Stage myStage;
									myStage = new Stage();
									myStage.setTitle( "Swing in JavaFX" );
									myStage.setScene( new Scene( pane, 250, 150 ) );
									myStage.show();

								}
							}.run();
						} );

					}
				} );
				swingNode.setContent( button );

			}
		} );
	}
}
---------- END SOURCE ----------

FREQUENCY : always