On mobile site, do this: click add comment
to bring comment text box. Then, tap/click any link on page after scrolling comment box out of screen view.
It'll scroll page up or down to comment box. It doesn't disturb most of times because a new page is loaded instantly (I don't know about slow connection users). But, it becomes annoying when I tap top-right down arrow.. & I need to scroll to top of page to see its output.
Same thing is happened when I long-tap a link to bring options (to bookmark, open in new tab). Its one more reason of frustration.