I can confirm. Until we investigate if this is upstream or Artix issue, you can fix it BEFORE you leave the live environment by chrooting into the installation partition as follows:
# artix-chroot /tmp/calamares-root-XXXXXXX (a random string created by the calamares installer)
# grub-install /dev/sdX (your drive letter)
# grub-mkconfig -o /boot/grub/grub.cfg