Creeps running from attacker

[Arhowk]

Whenever I attack creeps, the creeps keep running away from the hero unless the hero is extremely close

 

[SeriousEnemy]

Look in your object editor for single units.
Acquisition range


Otherwise check Gameplay Constants or your triggers.
(I'm not sure how it's called in english.. but if you check the gameplay constants you will find something like distress call or cry for help)

 

[Xonok]

The creeps can't see or damage the hero.
Wander(neutral) can also cause this.