WebView is blinking ( flashing with black background ) while moving mouse over after unlocking desktop.
Step to reproduce :

- Create a simple Stage that contain only a WebView element.
- Launch the sample and move mouse over elements of the page --> Nothing bad happen
- Hit CTRL+ALT+DEL and ESCAPE
- Move mouse over WebView --> Black blincking occurs according to mouse movements.

It occurs only with JDK 1.8

Here is the sample code : 

public class Main extends Application {

	public static void main(String[] args) {
		launch(Main.class, args);
	}
	
	@Override
	public void start(Stage stage) throws Exception {

		WebView wv = WebViewBuilder.create().build();
		stage.setScene(new Scene(wv));
		

		
		wv.getEngine().load("http://maps.google.com");
		stage.show();
		
	}

}