This is not a bug per se since I believe everything is WAI. Cleansing Flame - "Target champion within 4 spaces takes 10 Fire damage and loses all positive and negative conditions" It never says that the target is cleansed just that positive and negative conditions are removed. In theory it should be able to remove effects like Doom that cannot be cleansed. Cleansing Flame likely needs its text updated to: Cleansing Flame - "Target champion within 4 spaces takes 10 Fire damage and is Cleansed and Dispelled. "