Menu "jumps" in chrome and edge

Hi, I ve installed Cloudhost for Joomla 3 and got a big problem : when looking in Firefox, everything's ok. But when looking in Chrome or Edge, the main menu is "jumping" when you scroll....
I've installed "quick start" in Xampp and see the same trouble.... Have you a solution ?
The site is here : http://controlsys.fr/index.php/fr/

Thx

Please add this code to override.css and make sure override is enabled in template settings.

Code: Select all

#gkMenuWrap.active {
    position: fixed;
    top: 0 !important;
}


Please add this code to override.css and make sure override is enabled in template settings.

Code: Select all

#gkMenuWrap.active {
    position: fixed;
    top: 0 !important;
}


Thanks for your answear, I found a solution by copy/past the elements of another website I've done with Cloudhost (old but up to date) and that's ok.
But I will try this solution on the quickstart site with xampp....

Hi

Ok. Let know if it worked please.