As always your attention to addressing these bugs is appreciated! I guess the main thing I would be curious about after this is, if it were fixed, would I need to redo Potluck mode again? Or would the star be automatically triggered and unlocked after a hypothetical update?
Viewing post in Bug Report Thread
To update on my side of things, I can now confirm that I started up the game fresh; went into Custom Night mode, selected Potluck, and clicked nothing else besides Play to start it up. Completed it on the first try of that session and still got no third star, so there definitely seems to be something tied to the star unlock trigger.