--- old/modules/javafx.graphics/src/main/native-glass/gtk/GlassApplication.cpp	2017-04-04 10:18:09.775716502 -0700
+++ new/modules/javafx.graphics/src/main/native-glass/gtk/GlassApplication.cpp	2017-04-04 10:18:09.575716509 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011, 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, 2017, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -516,6 +516,8 @@
                 default:
                     break;
             }
+            // update GTK structures to receive the synchronous changes
+            gdk_display_sync(gdk_display_get_default());
         } catch (jni_exception&) {
         }
     } else {