Yes, Spring Festival is bugged and Theatre of Blood is bugged too.
theater aint,getting stuck is random so a lil different
As long as you get random server errors, I would call that a bugged event :< I have yet to be able to go through a full Theatre without getting an error, so I've stopped trying.
you'd always get server errors if you actually try spamming skills after getting stuck and from what i know its random and only for the peeps who carry Ashura