I don't know if this is considered a bug but after you get the quest to get the royal honey if you leave the collector hq and reenter it so it resets to normal in the research room there is a researcher named Matt. He is looking at a monster in a glass case. In this case, however, there is no monster in the case. However his dialogue does not change. "I've been trying to discern a pattern in this creature's movements, but i can't seem to find any."
Before this the case was filled with one ghost and after the festival the case is filled with many ghosts.
Before this the case was filled with one ghost and after the festival the case is filled with many ghosts.