I've noticed a few times in battles (all types i.e. pvp, ranked, arena), that Orochimaru won't revive after 2 rounds when he used "Cursed Ninjas" in the same team for revival instead.
For example:
If Orochimaru died at round 2, then instantly revived from Cursed Ninjas, if he died again at round 3 he won't revive at round 5. But in his passive still says he will revive every 2 rounds. Is that bugged or he actually has limited revival?
Other than that I guess it's SORT of efficience for Traitor to be revived and instantly summon First.