Sometimes the Button does not work

Hey guys,

today we went live with our new website.

but there is a bug in the portfolio/case section.
The first two cases have buttons to get to the app/website we have built.
The button works most of the time. But when I scroll up and down, use a anchor in the main nav, then the button “get the app” + “visit the website” does not work . It can’t find the bug.

I hope you can help me.


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