Greetings,

Please rest assured that this is in fact not a bug. In order for the alternative opening cutscene to play, you had to have cleared the Castrum Novum quest in 1.0. If this requirement was not fulfilled before the final data save, this opening will not be viewable.

I apologize for the delay in answering the questions and concerns about this, but if this was holding you up from progressing, please know that it is safe to do so. We hope you enjoy the story!