I havent noticed any, but then, I havent played that far in and dont really know what the game is supposed to sound like normally. I dont know twine that well yet so this is just guesswork, but since most of your players are probably playing with local file as opposed to loading from a web server, precaching doesnt seem to offer any advantage over say setting up one player for bgm, one for event sound, and changing them to new sound files as needed? That seems like it would be a bit gentler on the number of files and objects loaded at once, so conserve ram and speed things up overall. And would nicely sidestep this bug.