Anchor link to section within div

I’ve been racking my brain and I’m sure this is something simple I’m missing. I’m trying to create an anchor link within a div with overflow set to scroll. The link is access via the + symbol in the bottom right container. When the + is clicked, the menu expands. I’m trying to get the About Us link to scroll to the About section on the page. When I load the URL, it works. However, if I scroll on and refresh it again, it doesn’t load to the section. Not sure what to do.

Here is my site Read-Only: LINK
(how to share your site Read-Only link)