I don't think this could be a model issue with not following properly (I hope for the sake of ElevenLabs), otherwise this would the most botched model release we've seen so far. Their main product release with a demo and not a single person listened to/read that demo and noticed the difference?!

Something must have happened here, miscommunication between departments so the blog post authors/owners and whoever made the actual music generation missed some update in-between when they made this and the release. If it's truly that the model chose not to follow passed lyrics/hallucination, and they still released this, I'd be lost for words.