Funny movement of non modal Vaadin Windows

Flow
1

Hi,

i have an issue concerning the window handling in Vaadin 8.3.1 and Internet Explorer 11.

If we do a right-click (content menu) in the title-bar of a non modal window, the window follows the mouse pointer and cannot be controlled anymore. Sometimes it does not happen at the first click, try some more right-clicks followed by left-click. This problem can be forced on your sampler page too.

I found a little workaround to get the window working again. I’ve added a click-listener for the right mouse button. By pressing the button the winow will be set to modal = true:

    addClickListener(new MouseEvents.ClickListener() {
        /** Auto generated ID. */
        private static final long serialVersionUID = 4085799603852428667L;

        @Override
        public void click(final ClickEvent event) {
            if (event.getButton().equals(MouseButton.RIGHT)) {
                setModal(true);
            }
        }
    });

A left-click brings the window back to normal. Does anyone knows this issue?

Kind regards,
Ralf Schönhoff