How to disable macOS genie effect when JavaFX FileChooser opens?

Question

When opening a JavaFX FileChooser within a Stage (only way to make it modal), there is an annoying "Genie" effect (see code and movie below). How can it be disabled ?

import javafx.application.Platform;
import javafx.embed.swing.JFXPanel;
import javafx.stage.Stage;
import javafx.stage.FileChooser;
import javafx.concurrent.Task;

public class Test {
    private static void initFX() {
        // This method is invoked on the JavaFX thread
        Stage stage = new Stage();
        FileChooser fileChooser = new FileChooser();
        stage.setMaxHeight(0);
        stage.setWidth(0);
        stage.setTitle("Choose an file");
        stage.setResizable(false);
        stage.setAlwaysOnTop(true);
        stage.show();
        fileChooser.showOpenDialog(stage);
        stage.hide();
    }

    public static void main(String[] args) {
        final JFXPanel fxPanel = new JFXPanel();
        Platform.runLater(new Runnable() {
            @Override
            public void run() {
                initFX();
            }
       });
    }
}