JavaFX Cannot Get Focus In TextFields

[realumhelp]

I am running PdfFXViewer.java with no modifications and it works fine. However, when I add something else to the BorderPane I can no longer get focus inside of the icepdf Panels. I tried both OpenJDK11 /w OpenFX11 and JDK1.8.

For example add in PdfFXViewer.java:

    @Override
    public void start(Stage primaryStage) throws Exception {
        BorderPane borderPane = new BorderPane();
        Scene scene = new Scene(borderPane);

        //////////////////////////////////////////////////////////////////////////////
        //Add something else to the BorderPane
        HBox hbox = new HBox();
        TextField tf = new TextField(); //(javafx textfield)
        hbox.getChildren().add(tf);
        borderPane.setTop(hbox);
        //////////////////////////////////////////////////////////////////////////////

        // add viewer content pane
        createViewer(borderPane);

It is like JavaFX is no longer giving up Focus over to Swing or something is throwing an Exception that is getting eaten in the background. I tried turning on logging without much success. If anyone has any ideas I'm all ears!

Thanks!