Nav and Bottom Sticky Modal won't stick on mobile

Hi all,

For some reason, the nav and the bottom sticky modal won’t sticky anymore on tablet, phones, and below. Please advise. Thank you!


Here is my site Read-Only:

https://preview.webflow.com/preview/mushroom-marketing-website-01?utm_medium=preview_link&utm_source=designer&utm_content=mushroom-marketing-website-01&preview=19a2b84186638b7f8c07a5fc61f33297&pageId=635302caff883206bb891ca2&workflow=preview