//Heavy task inside this thread, we go to user pane before
            Task<Void> task = new Task<Void>() {
                @Override
                protected Void call() throws Exception {
                    hashtagTabController.setHastagViewer(hastagViewer);
                    return null;
                }
            };

            Thread thread = new Thread(task);
            thread.setDaemon(true);
            thread.start();