Build issues?

I'm looking for some serious help right now. I'm having some weird issues when I build my game to standalone. In the editor, everything is fine, but in the builds, enemies move REALLY slow. Their position is set using... GetComponent<Rigidbody2D>().MovePosition(Vector2.MoveTowards(transform.position, TargetPos, MoveSpeed * Time.deltaTime));

I don't understand what can cause this. Is the editor script fields not getting carried over into the build?