I've tried calling the excerpts with the widget and the shortcode and have the same issue each time. If the page is currently scrolled past the bottom of the excerpts element, when one excerpt fades out and the next fades in the page jumps to line up with the bottom of the element.
As my page is quite short and the excerpts are at the bottom of it, this issue is a lot more noticeable.
I've tried turning off all plugins except this one and get the same issue. Any ideas?