QAnon

In this demo I’m trying to create a navigation that scrolls horizontally to show more navigation items as the user scrolls down the page, the navigation allows the user to manually scroll horizontally and click on different nav items and will scroll to that section of the page. The issue comes when the user manually scroll horizontally, then click on a nav item, the navigation jumps. How can i control this part of the animation to create a smooth transition after the user scrolls the navigation horizontally?