Hello,
Try changing the order of servers retained by rankmirrors.
It seems to me that it is the first server in the list that is used.
Here in eastern France, very close to Germany, I use this mirrorlist and I had to move mirror1 to the bottom of the list, whereas rankmirrors had once placed it at the top of the list :
Server = https://mirror.one.com/artix/$repo/os/$arch
Server = https://mirror.pascalpuffke.de/artix-linux/$repo/os/$arch
Server = https://artix.unixpeople.org/repos/$repo/os/$arch
Server = http://mirrors.redcorelinux.org/artixlinux/$repo/os/$arch
Server = http://mirror1.artixlinux.org/repos/$repo/os/$arch