Yield waitforseconds not consistent for animation-unity2D

While trying to delay the execution of the code, yield waitforseconds is not working consistent . yield waitforseconds works properly except for a few times . Below is the code snippet

 function teleport_me(){
     if (teleport==true){
     
     anim.SetTrigger("teleport_in");
     yield WaitForSeconds (0.5);
     other.gameObject.transform.position = Vector3(target.transform.position.x, target.transform.position.y,0);
 
     }
     teleport=false;
 }