I encountered this glitch too. I'd really like to get Oathkeeper, so is there a way around this?
Edit: Yes! I found a workaround: I saved the game, then quit the iso and loaded the untranslated Japan iso. The cutscene played fine. Since the saves transfer between the translated and untranslated versions, I suspect this will also solve the problem of rare heartless not appearing.
Edit 2: Yes, it does! Using the original Japanese version, I got all the rare heartless to spawn when they weren't spawning in the translation. Based on the commends, it seems the translation can't support the rare heartless right now.
