@Leizurtime
This is a community quest, so your own effort to help complete it is actually added to all other players doing this as well. This explains why you gain points for its completion even if you don't do anything yourself.
However, if your issue is with the Free Your Rage event, and not with the Old Rivalry one, then this means both events are bugged, and what solved the issue for one of them, didn't solve or wasn't applied to the other? How typical. Like with resistances lingering for longer then intended, they fix one character, but not all of them. Also with the corpse attacking BUGs and the stuck sound bugs, and many others of course.
So we should expect all community challenges will BUG like that? Honestly, I'm just entering in the game these days to get the prizes for the sake of completionism. I haven't even seen the quests counters yet. I hope I'm proven wrong and we can do quests normally.