Accordion disappears while it isn't off screen yet

I have an accordion widget placed on my page, the final accordion tab is rather large and when I scroll down near the end it simply disappears while it should simply move off screen slowly. I can't seem to fix it, is this some sort of bug?

See for yourself:

http://sveikivaikai.businesscatalyst.com/enterokind-daugiau.html#card3

Any ideas anyone?

Any help would be greatly appreciated