Focus change listener is triggered twice

To reproduce run the app and push 'Tab' several times.
You will notice that when focus goes from the rectangle to the text
the rectangle will fire change event.

import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.scene.Scene;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.scene.text.Text;
import javafx.stage.Stage;

/**
 * @author alexandr_kirov
 */
public class NewClass extends Application {

    @Override
    public void start(Stage stage) throws Exception {

        Text text = new Text("text");
        text.setFocusTraversable(true);

        Rectangle r = new Rectangle(100, 100, 100, 100);
        r.setFill(Color.ALICEBLUE);
        r.setFocusTraversable(true);

        text.focusedProperty().addListener(new ChangeListener<Boolean>() {

            @Override
            public void changed(ObservableValue<? extends Boolean> ov, Boolean t, Boolean t1) {
                System.out.println("Text focused.");
            }
        });

        r.focusedProperty().addListener(new ChangeListener<Boolean>() {

            @Override
            public void changed(ObservableValue<? extends Boolean> ov, Boolean t, Boolean t1) {
                System.out.println("Rectangle focused.");
            }
        });

        VBox vb = new VBox();
        vb.getChildren().addAll(r, text);

        Scene scene = new Scene(vb, 300, 300);
        stage.setScene(scene);
        stage.show();
    }

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