I’m currently working on this site: https://bergbuchbrig.pre-view.ch/
There are three bars: The top (white) one and the third (colored) one have to be sticky (and that works fine). The middle bar with the logo should go away. That works fine too. But if I scroll the page, there is a stuttering with the middle bar when the site goes in the initial position (all bars are visible). That means that the logo is jumping… I hope you understand what I mean Maybe you can reproduce it when you scroll up and down.
What could I do to prevent this unexpected behaviour?