Form Block Causing Scroll Jitter on Mobile Screens

A client recently handed me their website that they had put together themselves. It seems the form block on the bottom of the site is causing a severe jitter - only on mobile screens. Follow the read-only link below and attempt to scroll past that form at the bottom.

Do you have any ideas what might be causing this?

Here is my site Read-Only: Webflow - Glide Window Cleaning (Final)

Here is the prod site: