EXP removed from challenges

[pibedetorres]

My only regret with the current situation is that the cooldown reset only applies the first time *also* for the enemies you don't manage to kill the first time. So when I try again later it becomes even harder to finally kill them, since there's no cooldown reset this time. Kind of makes me hesitate to even attempt a challenge for the first time until I'm quite sure to kill all enemies till the last.

I wish the cooldown reset would still happen when we face enemies we never killed before, but if that's not possible I'll just wait till I'm able to kill all monsters on my first attempt.