Im not going to say i know what causes it but it always seems the worst durming festival, crystal cove, and mabar events if you cannot make these things work smoothly with the rest of the game running please do not turn on these stupid events. They are a drag on the rest of the game and are making it very difficult to run anything. I would rant alot more but i dont want to get banned because there is alot more i would like to say about this and none of it is nice.