Re: Promise of Destruction Bug

@GudoElCeroM Do you remember if, after finishing the quest, you had a conversation with Cass back at Skyhold? Have you had further conversations with her that reference what happened in the quest? It's possible it's just your quest log that's bugged, and the plot flags are as they should be having completed the quest. In which case, it's just a mild annoyance, but nothing that's going to ruin your playthrough.