Challenges for the 10 year anniversary event are not updating nor progressing along with weekly and all other challenges. I’ve completed said challenges but they’re not updating and I’m not receiving the rewards for them. I’ve seen a few others have this same issue with no update or feedback.
Based on how they responded to everything in their tweet via essentially victim blaming, I don’t think they’ll acknowledge the issue. You’ll unfortunately just have to grind the repeatable challenge.
Grinding won’t do anything, literally not a single challenge progresses. I personally had to track the amount I’ve done and nothing shows completed or changed. For example: I completed arcade support 5/5 however it shows 2/5 completed along with all the others. 
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