This problem was introduced by ZS in March 2023 with these commits:

https://bitbucket.org/tmidas/midas/commits/25b13f875ff1f7e2f4e987273c81d6356dd2ff53
https://bitbucket.org/tmidas/midas/commits/2a9e902e07156e12edecb5c2257e4dbd944f8377

by setting

 d.style.position = "fixed";

which prevents the scrolling. I have no idea why this change was made, so it should be fixed by the original 
author.

Stefan