When fighting a several enemies at once. Follower feels more sluggish and reluctant to engage. Follower behaves like it is trying to engage a target outside its reach in a group of enemies, but unable to close the distance.
Follower will make poor targeting decisions like try to fight the dancers through the wall outside Conan’s bar rather than fight enemies peppering them with arrows in their direct line of sight.
Speculating/suggesting - that this could be remedied by forcing the Follower to prioritize fighting what is within reach of its weapon or closest target when set to melee.