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Navbar Hides on Scroll down but wont show on scroll up

https://preview.webflow.com/preview/mylesperkinscreative?utm_medium=preview_link&utm_source=designer&utm_content=mylesperkinscreative&preview=3ab6d7e68b409c62576144d46f4edd2c&mode=preview

is my site and I cant seem to get it to reappear when scrolling up