Simple Scroll Bounce Issue

Hi all,
Pardon this noob website. You’ll shudder if and when you click the back end link. But I’m revisiting it for a few small client tweaks.

He and I are noticing on mobile, there’s a scroll bounce where-- though the nav symbol is fixed-- it still tucks upwards when you scroll. I have a pixel and use Chrome. the browser slides the html address field upwards too, so maybe there’s no solution here.

But would love anyone’s thoughts as to fixing this or describing what I can tell the client ?
Many thanks.

www.minjae.kim


Here is my site Read-Only: https://preview.webflow.com/preview/minjaekim?utm_medium=preview_link&utm_source=designer&utm_content=minjaekim&preview=f39f8c3fd64fb07ed623eb63d75a9eee&mode=preview