when a new expac comes out I like to complete the class challenges because it usually incentivizes to play with some interesting and half of the time non competitive decks. So when it's already frustrating to play a non competitive deck just for a challenge it really sucks when the challenge is bugged and doesn't register. Right now I'm on the Flower Power Druid challenge that requires you to Summon a 10-cost minion and cast a 10-cost spell with Nightshade Bud in one game. I've done this several times to no avail. So then i thought maybe i was doing it wrong and put Fandral Staghelm in my deck and just finally got the combo i needed of doing it in one play and it's still incomplete.