Javafx custom cursor reverts to system when hovering over background - javafx

Question

I have added a default cursor:
someScene.setCursor(getSomeCursor());
This is working. I have this cursor-code working everywhere in my application, and it looks fine. But whenever I hover over a background GUI component, even if that background component, (be that a VBox, a Canvas or whatever), uses the correct cursor itself, the cursor reverts to the system cursor, instead of my custom cursor.
Any help appreciated.
Here is a complete worked example, which exactly produces the problem: the http link to that "blue cursor" was live at the time of posting. But please check if you get a problem reproducing.
import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.scene.ImageCursor;
import javafx.scene.Scene;
import javafx.scene.canvas.Canvas;
import javafx.scene.control.Button;
import javafx.scene.image.Image;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.stage.Modality;
import javafx.stage.Stage;
import javafx.stage.StageStyle;
public class CursorTest extends Application {
#Override
public void start(Stage stage) {
SomeDialog someDialog = new SomeDialog(stage);
GridPane root = new GridPane();
HBox buttonHolder= new HBox();
buttonHolder.setPrefSize(300,300);
Scene theScene = new Scene(root);
Canvas canvas = new Canvas();
canvas.setWidth(300);
canvas.setHeight(300);
canvas.getGraphicsContext2D().setFill(Color.RED);
canvas.getGraphicsContext2D().fillRoundRect(100, 100, 100, 100, 10, 10);
Image cursorImg = new Image("http://www.pngmart.com/files/3/Cursor-Arrow-PNG-Transparent-Image.png");
ImageCursor imageCursor = new ImageCursor(cursorImg);
theScene.setCursor(imageCursor);
stage.setTitle("Ribbon dialog");
stage.setScene(theScene);
VBox vBox = new VBox();
vBox.getChildren().add(canvas);
vBox.setSpacing(50);
Button button = new Button("Show modal");
button.setPadding(new Insets(30,30,30,30));
button.setOnMouseClicked(event -> {
someDialog.showMeAndWait();
});
buttonHolder.getChildren().add(button);
root.getChildren().addAll(vBox, buttonHolder);
stage.show();
}
class SomeDialog {
Stage newStage;
public SomeDialog(Stage primaryStage) {
newStage = new Stage();
GridPane gridPane = new GridPane();
Scene theScene = new Scene(gridPane);
Image cursorImg = new Image("http://www.pngmart.com/files/3/Cursor-Arrow-PNG-Transparent-Image.png");
ImageCursor imageCursor2 = new ImageCursor(cursorImg);
theScene.setCursor(imageCursor2);
theScene.setCursor(imageCursor2);
theScene.setFill(Color.TRANSPARENT);
newStage.initOwner(primaryStage);
newStage.initModality(Modality.APPLICATION_MODAL);
newStage.setTitle("Player inventory");
newStage.setScene(theScene);
newStage.initStyle(StageStyle.TRANSPARENT);
VBox vBox = new VBox();
Button someBtn = new Button("Close");
someBtn.setPadding(new Insets(100,100,100,100));
someBtn.setOnMouseClicked(event -> newStage.close());
vBox.getChildren().add(someBtn);
gridPane.getChildren().add(vBox);
}
public void showMeAndWait() {
newStage.showAndWait();
}
}
}