Firing scroll interactions on elements inside parents set to Auto?

I have a somewhat unique layout that I’d like to explore, but the scroll animations aren’t firing if I enable the scroll bar and click to use it. All the content for the site is inside a Div, so the Body isn’t scrolling at all.

The animations work just fine if I use the scroll wheel on my mouse, which is why the scrollbar is disable right now. I would like to enable the scrollbar because…good UI. Is there a workaround for this?

Here is my public share link: [LINK][1]