Slider wont work

Hi im trying to build a slider the problem is that the the slides only slide half way when you load the slider for the first time. When you load or view the slider for the second time it works strange any help would be much needed

https://preview.webflow.com/preview/family-tree-2367d2?utm_medium=preview_link&utm_source=designer&utm_content=family-tree-2367d2&preview=aeb21e745d8cbbd15cdc4b045d6c5fa2&pageId=60a130cbbb3434586e9f4cde&workflow=preview

Here is my public share link: LINK
(how to access public share link)