I did Mad King says earlier and messed up enough to only get 2 fragments. Same day I came upon the event again late, but knew I only needed 1 more fragment for that day, so I jumped in to earn my last fragment. Got the buff to 5 before the event ended, but no event rewards were issued. What is weird is I did get experience for completing the event (got rewards for leveling, just not for the event itself). I was not at the 3 max fragments per day yet. Is there a bug where showing up too late into the event doesn’t award event rewards, even though you have the buff stack at the necessary amount?