[Decora] Render bug animating over node with lighting effect

This simple animation of a path node over a rect node with lighting effect leaves a trail of rendering artifacts.

import javafx.animation.RotateTransition;
import javafx.application.Application;
import javafx.scene.*;
import javafx.scene.effect.*;
import javafx.scene.paint.Color;
import javafx.scene.shape.*;
import javafx.stage.Stage;
import javafx.util.Duration;

public class DrawTurd extends Application {

public void start(Stage aStage)
{
    // Creat background rect with lighting effect
    Rectangle rect = new Rectangle(0,0,500,400); rect.setFill(Color.YELLOW);
    Light.Distant light = new Light.Distant(); light.setAzimuth(60); light.setElevation(120);
    Lighting lighting = new Lighting(); lighting.setLight(light); lighting.setSurfaceScale(10);
    rect.setEffect(lighting);
    
    // Create foreground path triangle with rotation transition animation
    Path path = new Path();
    path.getElements().add(new MoveTo(100,100)); path.getElements().add(new LineTo(180,180));
    path.getElements().add(new LineTo(260,100)); path.getElements().add(new ClosePath());
    path.setFill(Color.RED); path.setStroke(Color.BLACK);
    RotateTransition rt = new RotateTransition(Duration.millis(3000), path);
    rt.setByAngle(180); rt.setCycleCount(4); rt.setAutoReverse(true); rt.play();
   
    // Create group, add nodes, set scene root, show stage
    Group group = new Group(rect, path);
    aStage.setScene(new Scene(group));
    aStage.show();
}

}