Vaadin 7 subwindow close button not working

Vaadin 6 / 7 / 8
1

When I open a subwindow from main UI with using addWindow() I can’t close it with default “X” close button. Does anyone had the same problem?

2

Could you share some more code. Especially anything related to event listeners for the sub-window, in case you would have accidentally overridden some default behaviour?

Does this simple case work in your browser?

@SuppressWarnings("serial")
public class TestUI extends UI {

	@Override
	protected void init(VaadinRequest request) {
		
		VerticalLayout vl = new VerticalLayout();
		setContent(vl);
		
		Window window = new Window("Sub window", new Label("Content"));
		
		addWindow(window);
	}

}