Hello! Yes this is a bug 😠Does this keep happening if you reload an earlier save file? Also did this happen after you picked up one of the files or after going back from the main menu?
i only managed to progress after loading an earlier save file and redoing my progress from there (it didn't take long, though!). and it happened while i was going through the entrance.png puzzle i think? i got a little stuck on that part (my fault), so after switching from the desktop to the game a bunch of times this suddenly happened and would happen whenever i tried to open the game on that save file