My navbar stays in place on the home page but it scrolls up with the rest of the page on other pages. It’s a symbol so it’s CSS is the same regardless of which pages it’s on. The containing divs all have their positions set to relative.
Difficult to know what’s going on without the public link, but you should put your nav higher in the hierarchy, right under the body, if it’s fixed to the page. i’m sure it will fix this issue.