Not too sure how noticeable it'll be, but I'm in the middle of updating Labyrinthian with a new version while making the original launchable as well, and I'm rusty so it's a little trial and error. Sorry, but it shouldn't take too long, then there'll be another post on here as well.
Possible Downtime
Build and release context
Steam update times within 24 hours of this post. Matching dates do not confirm which build it describes.
Build 2490832 · public branch
Steam updated · First observed