MouseEvents in TitlePane not fired

The TitlePane doesnt deliver MouseEvents when listening on the scene.

Example code:
Behaviour: When clicked on the red circle, no event is fired.


    @Override
    public void start(Stage primaryStage) throws Exception{
        TitledPane titledPane = new TitledPane("Circle", new Circle(30, Color.RED));
        Pane root = new Pane(titledPane);
        titledPane.setTranslateX(50);
        titledPane.setTranslateY(50);
        Scene scene = new Scene(root, 300, 275);

        scene.setOnMousePressed(event -> {
            System.out.println(event.getX() + " " + event.getSceneX() + " " + event.getScreenX());
        });
        primaryStage.setScene(scene);
        primaryStage.show();
    }