Campaign: Wyldwood
Objective: Find the skeletons of 6 rangers in the main Wyldwood map

Bug: It works fine if you just accept it and do it, but unfortunately I didn't. If you partially complete it(e.g., reach 3/6 or even 6/6 without turning it in), then abandon it, you will not be able to ever fully complete it.

I'm guessing after you talk to a ranger it gives you 1/6 quest completion, as well as a "token" in the code, which keeps the NPC from giving you another 1/6 of the quest if you talk to him again. That keeps you from being able to just stand in one place and talk to one ranger 6 times. When you abandon the quest, it does not reset these "tokens". So if you pick up the quest later, you won't get any quest completions from the ranger NPC's that you talked to the last time you accepted the quest.

Thanks for reading. Hopefully, this is fixed soon.