The version of the cinnamon (https://packages.artixlinux.org/packages/?sort=&q=cinnamon) package in the Galaxy repo is 6.4.2-2. This version of cinnamon is outdated and has a lot of issues. Arch already updated its cinnamon (https://archlinux.org/packages/?sort=&q=cinnamon&maintainer=&flagged=) package to 6.4.3-1.
Update: Cinnamon 6.4.3-1 is also broken and the power applet doesn't work on it but at least it doesn't boot to a black screen! I don't know why beta quality packages are being released in the first place. This is the second time in this month that updates broke cinnamon for me!
Cinnamon has been updated.
artist