I was trying at the beginning of the week to finish the time trial, but the darkness zone wouldn't trigger in the boss room. Even when I would go slow and wait around until 5+ minutes before going to the boss. I know some people talked about this previously and some were able to get it to trigger eventually, but it just won't for me. I held off and am trying to do it again now before reset, but it still won't work. I tried just finishing again anyway, and still after killing Skolas, the mission doesn't end and just keeps counting. Obviously not the end of the world, but I'd also like to not have to wait weeks until this hunt is around again. Knowing my luck, it will still be broken the next time around as well. Someone must have heard my plea, because it finally worked! Finally. Still, hopefully they can make a change so the zone triggers consistently. I should have just done these a couple years ago, haha.