FULL PRODUCT VERSION :
java version "1.8.0_45"
Java(TM) SE Runtime Environment (build 1.8.0_45-b15)
Java HotSpot(TM) Client VM (build 25.45-b02, mixed mode, sharing)

JDK the same version

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.3.9600] Windows 8.1 x64
Microsoft Windows [Version 6.1.1000] Windows 7 x64

A DESCRIPTION OF THE PROBLEM :
I tried to make a software that shows the different lights in JavaFX 3D.

I've created a Scene which holds 3D SubScenes. The SubScenes have all the same Sphere. Additionally I've created two light instances, one PointLight and one AmbientLight.

Then you tried to make a Scene with 3 SubScenes to show the default light, PointLight and an AmbientLight. There was no problem till this step. But then I tried to add one SubScene more with the two lights added to one SubScene.

After I got 4 SubScenes I realized, that the first 3 SubScenes not showing the setted lights, the all show the default light. Only the fourth shows the Sphere with two lights added (Point and Ambient).

Link to my stackflow question: http://stackoverflow.com/q/31175585/4170073

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Build the code and run.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Four SubScene's showing the correct light: Default; Point; Ambient; (Point, Ambient)
ACTUAL -
Four SubScene's where three of it showing the default light and one with both lights added.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import javafx.application.Application;
import javafx.scene.*;
import javafx.scene.control.Label;
import javafx.scene.layout.HBox;
import javafx.scene.paint.Color;
import javafx.scene.paint.PhongMaterial;
import javafx.scene.shape.*;
import javafx.stage.Stage;

public class Shapes3DViewer extends Application {

  PhongMaterial material;

  @Override
  public void start(Stage stage) {
    material = new PhongMaterial();
    material.setDiffuseColor(Color.FIREBRICK);
    material.setSpecularColor(Color.YELLOW);

    PointLight pointLight = new PointLight(Color.WHITE);
    pointLight.setTranslateX(100);
    pointLight.setTranslateY(100);
    pointLight.setTranslateZ(-300);
    pointLight.setRotate(90);

    AmbientLight ambient = new AmbientLight();


    Group g1 = createSphereGroup(100, "Default light");
    Group g2 = createSphereGroup(100, "Point light");
    Group g3 = createSphereGroup(100, "Ambient light");
    Group g4 = createSphereGroup(100, "Ambient & Point light");

    g2.getChildren().add(pointLight);
    g3.getChildren().add(ambient);
    g4.getChildren().addAll(pointLight, ambient);

    SubScene s1 = createSubScene(g1, 400, 400);
    SubScene s2 = createSubScene(g2, 400, 400);
    SubScene s3 = createSubScene(g3, 400, 400);
    SubScene s4 = createSubScene(g4, 400, 400);

    HBox root = new HBox();
    root.getChildren().addAll(s1, s2, s3, s4);

    Scene scene = new Scene(root);
    stage.setScene(scene);
    stage.show();
  }

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

  private Group createSphereGroup(double radius, String text) {
    Sphere c = new Sphere(radius);
    c.setMaterial(material);
    c.setDrawMode(DrawMode.FILL);
    c.setTranslateX(radius * 1.33);
    c.setTranslateY(radius * 2);
    Label lbl = new Label(text);
    lbl.setStyle("-fx-text-fill: red;-fx-font-size: 18pt;");
    return new Group(c, lbl);
  }

  private SubScene createSubScene(Group group, double width, double height) {
    SubScene s = new SubScene(group, width, height);
    s.setCamera(new PerspectiveCamera());
    s.setFill(Color.color(.1, .1, .1));
    return s;
  }
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Create own light-instances for the fourth case.