Disabling “jumping” menu when scrolling

Hello @skandha, I found this annoying bug on my WordPress page with the main navigation menu and scrolling - it's most noteable on this page: https://blumen-natur.de/pflanzensammlung-alphabetisch/ When scrolling on the page the navigation is hidden (which is wanted), but also the page is flickering when scrolling over a certain distance. In F12 the following is loaded together with the class="main-nav-scrolled": "<div id="content" class="site-content section" style="margin-top: [some number]px;"> It's the cause of the skipping "down" and "up" while scrolling. Is there any way to disable that functionality? Because i don't use my website as a business but as a personal blog, still i want people to have a good experience with it. Kind regards Michael