FULL PRODUCT VERSION :
java version "1.8.0_121"
Java(TM) SE Runtime Environment (build 1.8.0_121-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.121-b13, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601]

A DESCRIPTION OF THE PROBLEM :
If a Hyperlink is hovered, the mouse cursor changes from a normal mouse cursor to a hand like mouse cursor. There is a difference in hover-behavior between a hyperlink in a scene and a hyperlink in a popup window. If the mouse cursor hovers over a hyperlink in a normal scene an imaginary rectangle is used in background to change the mouse cursor into a hand mouse cursor, BUT in PopupWindow case the mouse cursor changes to a hand mouse cursor only if the mouse is exactly above the rendered pixels of the hyperlink text.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Start the example code. Click on "Open Popup"-Button. Now move the mouse above the two hyperlinks. You will see the difference in hover behavior for mouse cursor change.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Same behavior in both cases.
ACTUAL -
See description.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
public class JavaFXPopupWindowExample extends Application {

  @Override
  public void start(Stage primaryStage) throws Exception {
    final Button openPopupButton = new Button("Open Popup");
    openPopupButton.setOnAction(event -> {
      final Bounds boundsInLocal = openPopupButton.localToScreen(openPopupButton.getBoundsInLocal());
      new MyPopup().show(openPopupButton, boundsInLocal.getMaxX(), boundsInLocal.getMinY());
    });

    final VBox vBox = new VBox();
    vBox.getChildren().add(openPopupButton);
    vBox.getChildren().add(new Hyperlink("OOO"));

    primaryStage.setScene(new Scene(vBox, 500, 300));
    primaryStage.show();
  }

  private static final class MyPopup extends PopupWindow {
    MyPopup() {
      ((Pane)(this.getScene().getRoot())).getChildren().add(new Hyperlink("OOO"));
    }
  }
}
---------- END SOURCE ----------