1. Run app in a browser. Click on the text area;
2. Click ctrl + tab. Text area wil be focused.
But it is expected that the focuse will move to another control.

import javafx.application.Application;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.scene.Scene;
import javafx.scene.control.TextArea;
import javafx.scene.control.TextField;
import javafx.scene.control.ToggleButton;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class JavaFXApplication12 extends Application {
    
    SimpleStringProperty promptText;
    
    @Override
    public void start(Stage primaryStage) {
        
        promptText = new SimpleStringProperty();
        
        final TextArea textArea = new TextArea();
        
        ToggleButton bindUnidir = new ToggleButton("UNIDIRECTIONAL");
        bindUnidir.selectedProperty().addListener(new ChangeListener<Boolean>() {
            @Override
            public void changed(
                    ObservableValue<? extends Boolean> ov,
                    Boolean t, Boolean t1) {
                
                if (t1) {
                    textArea.promptTextProperty().bind(promptText);
                } else {
                    textArea.promptTextProperty().unbind();
                    textArea.setPromptText(String.valueOf(""));
                }
            }
        });
        
        ToggleButton bindBidir = new ToggleButton("BIDIRECTIONAL");
        bindBidir.selectedProperty().addListener(new ChangeListener<Boolean>() {
            @Override
            public void changed(
                    ObservableValue<? extends Boolean> ov,
                    Boolean t, Boolean t1) {
                
                if (t1) {
                    textArea.promptTextProperty().bindBidirectional(promptText);
                } else {
                    textArea.promptTextProperty().unbindBidirectional(promptText);
                    textArea.setPromptText(String.valueOf(""));
                }
                
            }
        });
        
        TextField text = new TextField("PROMPT TEXT");
        promptText.bind(text.textProperty());
        
        VBox root = new VBox(10.0);
        
        root.getChildren().addAll(
                textArea, bindBidir,
                bindUnidir, text);
        
        Scene scene = new Scene(root, 600, 400);
        
        primaryStage.setTitle("Hello World!");
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }
}