Flexslider thumbnails behaving very bad

Hey,

I need help with the Flexslider on my Productpages: http://filzreich.at/produkt/wander-sitzfilz-amanita-muscaria-vulgo-fliegenpilz/

The thumbnails on the left side go to top when i click on one, which is stupid because it looks bad and the other thumbnails hide when i chose the very bottom one.

I want it either to stop when the bottom thumbnail is in sight or to at least to loop infinitely.

“animationLoop: true,” only gives me the abillity to go back to the frist/last one when i click on the nav buttons after i reached the end.

How can i solve this problem?

Thanks in advance

https://ww.wp.xz.cn/plugins/woocommerce/