ADDITIONAL SYSTEM INFORMATION :
Works in JRE 1.8 341, breaks in JRE in 351, possibly related to https://bugs.openjdk.org/browse/JDK-8285881

A DESCRIPTION OF THE PROBLEM :
We are getting JavaScript issues when running a SAPUI5 Web application in a JavaFX WebView on JRE 1.8 351 and later.

REGRESSION : Last worked in version 8u361

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Open a simple UI5 application in a JavaFX WebView. An example application is deployed to <link>

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Page loads successfully
ACTUAL -
Blank screen

---------- BEGIN SOURCE ----------
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.VBox;
import javafx.scene.web.WebView;
import javafx.stage.Stage;

public class Main extends Application {

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

    public void start(Stage primaryStage) {
        primaryStage.setTitle("JavaFX WebView Example");

        WebView webView = new WebView();

        webView.getEngine().load("<Link>");

        VBox vBox = new VBox(webView);
        Scene scene = new Scene(vBox, 960, 600);

        primaryStage.setScene(scene);
        primaryStage.show();

    }
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Revert to an earlier JRE release, however customers need to be running latest release due to security concerns.

FREQUENCY : always