Yeah that is an issue. Don't know why Grisus is suddenly in the house during the prelude to chapter 3, I'll inform the coder.
Recently, the coder has removed the time needed to meet a character in order to help people to encounter them. Before they would only appear at a certain time, now they SHOULD appear if you meet the other requirements. It might have led some issues. There was also a scene helper implemented, which when you pick a scene you haven't seen. It would tell you what you need, and lead you to viewing the required scenes as well.
We've been tackling what we've found that this interrupted bit by bit, but reports like these help a lot.
Thank you.