Navbar scrolls with content on mobile (should stay on top)

niobee78

Hi, I'm updating an existing site, on my actual version when viewing the site on my phone (android) when scrolling the page the navigation bar stays correctly on top.
On the updated version it scrolls together with the content.
I cannot undersand what could cause this problem.. at the moment both sites are online, one is here: fineramps.com the other one is still in staging and can only be accessed through this link this second link includes a cookie that shows the temporary version.. if it worked right there will be a green border around the whole website informing you that it is the staging version of the site...

Here two short clips that show the different behaviours:

Thank you all.

niobee78

Short update: while I was searching for a solution I must have changed something, because now the bar doesn't stay fixed in Desktop view neither 🙁

niobee78

I think I solved the problem by adding this code to custom.css
#t4-header.t4-sticky { position: fixed; width: 100vw !important; left: 0; top: 0; }