Text in TitledPane cropped, see screenshot.Maybe text need cropping with ellipsis?
@Override
    public void start(Stage stage) throws Exception {
        TitledPane pane1 = new TitledPane();
        pane1.setText("title 1\nLong text long text");
        pane1.setContent(new Rectangle(100, 40, Color.SKYBLUE));
        pane1.setFocusTraversable(false);
        TitledPane pane2 = new TitledPane();
        pane2.setText("title 2\nLong text long text");
        pane2.setContent(new Rectangle(100, 40, Color.BLUEVIOLET));
        Accordion acc = new Accordion();
        acc.getPanes().addAll(pane1, pane2);
        acc.setExpandedPane(pane2);
        pane2.setAnimated(false);
        pane2.setFocusTraversable(false);
        acc.setFocusTraversable(false);
        
        acc.setStyle(style);
        
        BorderPane root = new BorderPane();
        Pane pane = new Pane();
        pane.getChildren().add(acc);
        pane.setMaxSize(100, 100);
        root.setCenter(pane);
        Scene scene = new Scene(root, 500, 500);
        stage.setScene(scene);
        stage.show();
    }