Skate-O-Ween Event1 tasks not updating..

I’ve completed all 17 challenge goals with a party in the three Skate-O-Ween Event1 Tasks (Challenge Goals in “Witch’s Brew”, “Spider Bait”, “Heathen Flip”). However the task list only registers that I have completed [11/12]. I have no way of completing the full Event 1 task list [5/6] and obtaining the reward of 200 chocolate coins and the zombie deck. Anyone having this issue or able to solve it? Thanks.