Problems after rotating character.

I honestly can't find what's wrong with it, but sometimes after rotating, the character randomly stops moving.

Here's my code (specifically the function where the character rotates):

 public IEnumerator TurnToTarget(Vector3 target, float rotDuration)
 {
   // wait until the hunter can move
   w$$anonymous$$le(!IsMoving)
   {
     yield return null;
   }
   // set states
   States previousState = state;
   state = States.turning;
   // the hunter is turning
   IsTurning = true;
   print ("turning");
   // the starting rotation
   Quaternion startRotation = transform.rotation;
   // the rotation needed to face the target
   Quaternion newRotation = Quaternion.LookRotation(target - transform.position, Vector3.up);
   print ("set lookrotation");
     
   // test if the rotation is equal
   if(startRotation == newRotation)
   {
     print ("startRotation == newRotation, cancel turn");
     // then the hunter has no reason to turn, so he doesn't
     IsTurning = false;
     state = previousState;
     // exit the coroutine
     yield break;
   }
     
   print ("elapsed time = 0");
   // set the elapsed time var to 0
   float elapsedTime = 0.0f;
   // turning loop
   w$$anonymous$$le (elapsedTime < rotDuration)
   {
     w$$anonymous$$le(!IsMoving)
       yield return null;
     print ("elapsed time: "+elapsedTime+"\nrotation: "+transform.rotation);
     // add time elapsed since last frame to elapsed time var
     elapsedTime += Time.deltaTime;
     float t = elapsedTime / rotDuration;
     // Slerp to the target
     print ("slerping");
     transform.rotation = Quaternion.Slerp(startRotation,newRotation,t);
     // return here next frame
     yield return null;
   }
   print ("done turning");
   // when done, turning is false
   IsTurning = false;
   state = previousState;
 }

If someone could tell me what I'm doing wrong here, I'd really appreciate it.