Hi, I have the same problem described in
https://archive.joomshaper.com/forums/helix-sticky-header-jump
However the proposed solution did not solve on my website.
In my case, the content jumps down, leaving a strip with no content below the header, as can be seen in:
http://dan4.sitiodobambu.com/index.php/pt/
Template: shaper_helixultimate
Please, any solution to this situation?