Baldur's Gate 3: Act 1 quest bugged if I try to do it in Act 2

EDIT: It's possible you can just skip this scene and everything continues on fine.

I couldn't find anyone else talking about this so I don't know exactly what triggers the problem. But a specific scene in the Act 1 part of the "Find the Githyanki creche" questline wouldn't work for me whenever I tried doing it in Act 2. It was definitely a bug: the scene would play, but then the game wouldn't update the questline, so the quest couldn't progress, and if I talked to those characters again the scene would happen again.

Afaict, while this quest isn't part of the main plot, it's reasonably important and will have consequences in Act 2. I wasn't super far into Act 2 so I replayed from an Act 1 save and it went fine. I haven't seen what happens next with this plotline in Act 2 so don't know if those parts are bugged.

I only noticed this bug after using a cheat, which could theoretically be the problem. But Act 2 saves from before I used any cheats were still bugged, and Act 1 saves weren't.

A minor Act 1 sidequest I hadn't finished worked fine when I did it in Act 2, but I don't know how many others might be bugged.

Below the cut: No major game spoilers, just enough details to identify the exact scene.
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