"It works very well and always takes the screen back to the beginning of the question"
That is not how it is supposed to work. It records the exact position the page is currently scrolled to (in pixels from the top of the page), then after the page has reloaded, it scrolls to exactly the same place.
If it is not doing that, then the JavaScript is not working properly on your system, which might be due to various things (particular web browser, something in a custom theme, ...). If we knew what was wrong, it might be fixable. (And, as I said, when I tested on qa.moodle.net, it worked exactly as I expected it to.)