Redditor AntonioS3 explained, “The new exploit has to do with deleting someone’s world exploration points (so things like seele, chests, culi like hydroculus and the likes).” This account-wide bug has disrupted gameplay for affected players.
AntonioS3 concluded by advising all players, regardless of their server, to refrain from joining co-op lobbies hosted by strangers “until the bug is fixed.”