I'm confused. They remade the game in a new engine, took out features, reworked things, and finally got to the point where it had actual gameplay again....then decided to remake the game in a new engine *again* ?? At least this update isn't that swap over...but that makes me question why this update exists if they are already porting it to another new engine anyway?
Discord rich presence isn't something that can be "accidentally left on" as it is something you specifically have to make, and download their SDK for, in order to implement. Discord doesn't just display any and all applications running on your computer, after all (though it does parse them). That said, I can't see the SDK in the game files, but just tested and it does indeed integrate with discord with a custom name and logo. Maybe they have it packaged in the project itself, rather than being loaded as a .dll like the rest of the third party content? On top of that, they renamed it to something else, since I can't find it in the manifest either.