Homepage Scrolling when clicking in “shop the feed”

Hoping someone here can help me. When i’m in my homepage https://virginiamayer.com/ and scroll down and click on a picture from “Shop the feed” in the primary right sidebar it should open a temporary window and I should be able to scroll up and down to view the full content in the temporary window. Instead i’m not able to scroll.

If I look at a blog post where the same side sidebar is also viewed, I can click on the “Shop the feed” and scroll so it seems the issue is only on the homepage. Any help to resolve this issue would be greatly appreciated. Thanks!

The page I need help with: [log in to see the link]