Download page not found when going back on a mirror link

If I select Kumi System e.U. Vienna as a mirror, and download, the page redirects to the .com website.

When I click "back" on the browser, to this URL, I get a page not found:

https://mariadb.org/download/?t=mariadb&r=10.6.5&os=Linux&cpu=x86_64&pkg=tar_gz&i=systemd&m=klaus2

Removing the mirror component returns a page. So 1) the mirror is not correctly reflecting, and 2) such a URL should never return a page not found, but rather sensible defaults.