No problem! I think I have a possible theory about what might have happened. Between 2020 and now I've had to replace my Hard Drive. In that time I migrated most of my files, including my old AppData folder contents, to keep save games in those locations. I think I might have installed via installer in the past, and by the time of the migration I forgot I wasn't playing on Portable. So maybe something gets installed in a location that I didn't migrate that caused the bug? In such a case the solution would simply be to reinstall the game, which is what successfully fixed my problem. Without knowing more of the causes this is the best theory I have lol