At least in region 5, all animals and monsters have been moving very slowly.
Birds and goats barely run away from you while close or hunting them, and jackyls take a long time to aggro onto you, move, and attack you. I also have a feeling this is also impacting the spawn rate of these creatures considering how far I've had to go to find some of them from my settlement. Everything else about the region seems to be performing smoothly, but this has been a constant exception for the past day or two (from what I've noticed).