Hello, @Dionizio Find,
You claimed that it is working fine on computers and laptops, but you are facing the issue only on mobile that (the header doesn’t disappear when scrolling the screen) so I have checked your site on my personal mobile phone, and here is the video for you: https://www.veed.io/view/ac62953c-998b-4f7f-bc9a-7b17df156155?sharingWidget=true&panel=share
It is working perfectly fine on mobile as well, it must be the cache issue at your end nothing else, please try to clear the mobile cache and check back or try to check on any other mobile phone.
Regards 8Themes Team.
