Large Testimonial Slider shifts entire page content up and down

The Large Testimonial Slider shifts the entire page content up and down if the content of each testimonial isn’t the same number of lines. So if one testimonial is 2 lines long and the next is 3 lines long, the entire page will be pushed down one line while the 3 line testimonial is visible.

Is there a way to maybe set a fixed height for the large testimonial box so it doesn’t change height as the content varies?

You can see it here as well if you change the page width so some of the content is 3 lines long.

Testimonials