Did it crash the game or were you able to close the message and continue to play. Because It looks like Micha Strodem was chasing something and had a glitch in their animation. This could be a one time thing based on many different situational factors.
chase_entity_action.lua and chase_entity_until_targetable_action.lua are the only chase_enitity files I can see.
bad frame transition to “start” from “stopped”
I did find this
http://discourse.stonehearth.net/t/bad-frame-transition-from-start-to-stopped/5239
http://discourse.stonehearth.net/t/bad-frame-transition-from-start-to-stopped/5239/4?u=geokhan
So uploading your stonehearth.log may shed some light on this.
@sdee did this ever get resolved?