Tasks bugged

A few times I've completed goals and they don't complete in the tasks list.
Sometimes it's a daily and the tasks for doing all the dailies still completes even though their is a daily task that looks uncompleted and the progress for it won't change even if I keep doing whatever the task is.

It's now an even more annoying issue though as the Skate-O-Ween event 1 tasks completed has been stuck at 5/6 even though it shows all 6 tasks as completed
, so there is no way for me to do the tasks or claim the reward.