Howdy!
So I've got an update for you. After reading your response I redownloaded your game, and the same bug happened to me again. To be more helpful I decided to record it for you, but every single time I tried to recreate it, it wouldn't happen again.
I decided to delete the game files, and use a fresh set, and the bug happened. I don't know 'how' these two things are related exactly. I did also notice your button prompt for 'A' had timing that was thrown off for the last two tutorial windows. That definitely has something to do with it, but the question is what is throwing that timing off in the first place? I've sent the footage to Hyblitz.
Also, as for the message text: I noticed after the initial section, you can do what I mentioned with skipping messages. Though in that opening section pressing A to skip messages doesn't work before the message is finished writing out.