Iskaara Community Feast

So, I’ve been working on my Tuskarr Renown by making the soup as often as I can, and it works quite well.
Today for the weekly event there were more people there than I have ever seen, and we got the soup to Legendary quality, but then it went back down to common. Is this normal, or some type of bug?
I’d just like to see some Legendary soup made at least once.