Link setting not working

I made a back to top button and linked it to the navigation section (which is the very top). However, it only works when I’m in the mobile checkpoint, not a web checkpoint. Does anyone know why?

Here is my public share link:

Thanks so much for your help in advance!

Hi, your navigation is ‘sticky’ in each breakpoint except mobile which is ‘absolute’. This means it is constantly on the screen in the other breakpoints so the screen has nothing to scroll back to.