[Linux] setScene doesn't affect immediately.

I use next code, where using buttons i change current scene.

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class JavaFX_ScenesChanging extends Application {

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

    @Override
    public void start(final Stage stage) throws Exception {
        Button b1 = new Button("Button 1");
        VBox vb = new VBox();
        vb.getChildren().add(b1);
        final Scene scene1 = new Scene(vb, 200, 200);

        Button b2 = new Button("Button 2");
        VBox vb2 = new VBox();
        vb2.getChildren().add(b2);
        final Scene scene2 = new Scene(vb2, 200, 200);

        b1.setOnAction(new EventHandler<ActionEvent>() {

            @Override
            public void handle(ActionEvent t) {
                stage.setScene(scene2);
            }
        });

        b2.setOnAction(new EventHandler<ActionEvent>() {

            @Override
            public void handle(ActionEvent t) {
                stage.setScene(scene1);
            }
        });

        stage.setScene(scene1);
        stage.show();
    }
}

When I press button, "old" scene stays on stage with pressed state of button and it [scene] is already inactive. To see "new" scene i need to drag and drop window.
Excuse me, if such bug already exists, in part, where scene setting is asynchroniuos. May be related to RT-19320.