I hate it when an animated header scrolls as I'm scrolling the page. Not sure how to describe it but when I scroll down, the header disappears. But if I scroll

I hate it when an animated header scrolls as I'm scrolling the page. Not sure how to describe it but when I scroll down, the header disappears. But if I scroll back up even a tiny bit, the header comes down back into view. It's annoying to me because I'm usually reading near the top of the page, and the appearing header is both distracting and often obscures what I'm trying to read.