There seems to be a bug with the event challenges of carrying the skull to the end of the level and possibly disrupting the ritual challenge. If joining an in-progress game after the ritual has been destroyed, the player who joined does not get either of the associated challenges of disrupting the ritual or carrying the skull to the end even if it is in the party’s possession.
Steps to Reproduce:
Join an in-progress game after the event ritual is disrupted and finish the level with the skull in possession.
Map Name (If Applicable):
Happened on Tower of Treachery but could also be affecting other maps.