Mobile Menu Disappears on Specific Page

I have one page “motion-test” where the mobile menu appears for a second then disappears. It might have something to do with how the page is setup for desktop. Been at this for a week now >.< any insight would be great, thank you!

Here’s my read-only link - https://preview.webflow.com/preview/casens-initial-project?utm_medium=preview_link&utm_source=designer&utm_content=casens-initial-project&preview=bd96f6f1456c8fb90b5f485455e77d93&pageId=5f516213973ad8e813b9ce03&mode=preview