The Silent Cave Atlas Points

+1 happened to me too. Killed all essences before doing boss (did not corrupt the essences), then killed map boss. I didn't die in this map, and I didn't portal out. Map is fully cleared but I still have the objective to kill the map boss. This was also a Cleansed map. Additionally, I can't create a new portal after killing the boss, with the portal tooltip saying "Portals are disabled in boss fights."

Bug Report ID: #740709011

Same