I just experienced a game-breaking mistake that I came here to report.
After the cutscene where you meet Luna up at the cliff, turn into a rabbit and go to Ark's house, if you go up to the cliff again, Luna is still waiting there even if she is following in your party and the cutscene repeats but gets stuck.
Anyway, this event is supposed to be a one-time event, it is not supposed to trigger again after it is done, you made a mistake there, so please fix it.