I suspect GoG tests mostly on Debian-based systems, probably Ubuntu and it's variants. On Arch, things get weird (at least in my experience, maybe other people have had better luck).

It's frustrating because Arch is generally more stable for me than Debian, but you can kind of see the niche status of the OS play out whenever you're working with a package that wasn't packaged by the Arch team. When developers have to maintain packages for multiple distros, my experience has been that usually the popular ones get serviced first and the niche ones get serviced last.