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Mobile interaction doesn't work right

Hi All, I am in need of fixing my own navigation. I had to create a second one that appears and disappears when it’s below the header section which works perfect on desktop but on mobile for some reason it appears when scrolled to top, the interaction is the same for both, the index is the same, I can’t seem to understand what is making it appear again on mobile-only at the top?

https://preview.webflow.com/preview/vml-technology?utm_medium=preview_link&utm_source=designer&utm_content=vml-technology&preview=9d64065c1909a4c601eba12952380824&mode=preview

Pls if anyone could help Id really appreciate it.