To reproduce run following code

Circle will appear immediately.
Expected: circle fade in every cycle.

import javafx.animation.FadeTransition;
import javafx.animation.ParallelTransition;
import javafx.animation.SequentialTransition;
import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.shape.Circle;
import javafx.stage.Stage;
import javafx.util.Duration;

public class FadeSample extends Application {

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

    @Override
    public void start(Stage primaryStage) {
        Group group = new Group();
        primaryStage.setScene(new Scene(group));
        Circle e = new Circle(50);
        e.setOpacity(0);
        group.getChildren().add(e);
        group.setTranslateX(50);
        group.setTranslateY(50);
        primaryStage.show();
        ParallelTransition pt = new ParallelTransition();
        FadeTransition transition = new FadeTransition(Duration.seconds(3),e);
        transition.setToValue(1.0);
        transition.setDelay(Duration.seconds(3));
        System.out.println(transition.getTotalDuration());
        pt.getChildren().add(new SequentialTransition(transition));
        pt.playFromStart();
    }
}