Dunno if you fixed it already, but if you use an old save then the bug still persists. Afaik it's due to a newly introduced variable called "canplaynormalscene" (or smth like that, i forgot) not being initialized in old saves. It prevents the game from starting the scene with the columns and portal at the home.
Perhaps, it'd be a good idea to add some kind of a debug button that initializes all the the uninitialized variables that should be initialized at the current stage of the game? Booting up mtool to manually fix the save is a hassle