When you ask a question and get a long response, the modal height grows too tall and moves below the bottom of the screen not allowing you to see the full response or even reposition the modal because the drag to move button is hidden. The only way I have found around this issue is to modify the position of the modal in Chrome Inspector (which is obviously not ideal).

I would suggest making sure that the height of the window doesn't get bigger than the viewable area of the screen and also changing the position of the drag button to the top-left corner of the modal (as opposed to the bottom-right corner where it currently is)