Regaining and losing auras and walking your party over puddles of water and blood causes micro stutters.
https://steamcommunity.com/app/1086940/discussions/3/3808408747681200679/ Another user also noticed the same issue and also said shadowheart and gale could be the cause of the stutters when walking over puddles of water/blood for some reason.
It becomes very apparent in act 3 where puddles of all kinds become very common and after you kill a group of people and walk all over the blood puddles.
