Webview never rendered after stage has been maximized and iconified

FULL PRODUCT VERSION :
java version "1.8.0_112"
Java(TM) SE Runtime Environment (build 1.8.0_112-b15)
Java HotSpot(TM) Client VM (build 25.112-b15, mixed mode, sharing)


ADDITIONAL OS VERSION INFORMATION :
MINGW64_NT-6.1 Daniel-Weil-PC 2.6.0(0.304/5/3) 2016-09-09 09:46 x86_64 Msys

A DESCRIPTION OF THE PROBLEM :
WebView not rendered in Javafx after stage been maximized and iconified

REGRESSION. Last worked in version 8u92

ADDITIONAL REGRESSION INFORMATION:
java version "1.8.0_112"
Java(TM) SE Runtime Environment (build 1.8.0_112-b15)
Java HotSpot(TM) Client VM (build 25.112-b15, mixed mode, sharing)


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Compile the attached example.
1) Click on "addWebView" button to check a webview is added
2) Maximized the window
3) Iconify the window
4) Un-iconify window
5) Click on "addWebView" button : no new webView is displayed
6) Un-maximized window, the new webView is displayed!!!


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package bugwebview;

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Separator;
import javafx.scene.control.ToolBar;
import javafx.scene.layout.VBox;
import javafx.scene.text.Text;
import javafx.scene.web.WebView;
import javafx.stage.Stage;

/**
 *
 * @author Daniel
 */
public class BugWebView extends Application {

    private VBox root;
    private VBox webViews;

    @Override
    public void start(Stage primaryStage) {
        Button addWebView = new Button();
        addWebView.setText("AddWebView");
        addWebView.setOnAction(e -> {
            WebView webView = new WebView();
            webView.getEngine().loadContent("hello world");
            webViews.getChildren().add(webView);
        });
        Button clear = new Button("clear");
        clear.setOnAction(e -> webViews.getChildren().clear());

        webViews = new VBox();
        root = new VBox();
        root.getChildren().addAll(
                new ToolBar(addWebView, clear),
                new Text("To reproduce:\n1)Maximize this windows\n2)Iconify Window\n"
                        + "3)Uniconify\n4)click on AddWebView button"),
                new Separator(),
                webViews);
        Scene scene = new Scene(root, 300, 250);

        primaryStage.setTitle("bug WebView not refreshed!");
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        launch(args);
    }

}

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