The ai shouldn't stop to turn unless they are far away. The ai has too much trouble trying to get close enough to catch you since they keep stopping when all they need to do is move straight towards you. The ai should only stop to turn if you are far away from them. They should turn while running if they are closer to you since it doesn't make sense why they would stop when they are that close to you. It makes the ai feel dumb or something and less smart than it actually is.
You can ignore this post since the ai is for the most part fixed. The post was originally made before patch 6 where the ai was improved.