Glitchy mobile background color change?


For some reason I’m having this glitchy interaction on mobile?

The bg color change is suppose to cover the whole screen, but what ends up happening is it glitches out and I see a couple blocks of colors that are not suppose to be in there.

I have a deadline coming up so any help would be greatly appreciated.

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