Can you use a character controller in a coroutine?

hye everyone,

I'm making a pathfinfing astar where the movement is done with the mouse click. I'm using a character controller for the movement because I need one that can climb stairs and steps. The pathfind works very well with a "Vector3.MoveTowards" but when I use a character controller the movement becomes anarchic.

 IEnumerator FollowPath()
     {
         Debug.Log("->FollowPath of Basehero");
 
         BaseTile currentTile = _paths[0].Neighbor;
 
         while (true)
         {
             Vector3 pos = transform.position;
             pos.y = 0;
             
             if (Vector3.Distance(pos, currentTile.PosPath) <= 0.05f)
             {
                 transform.position = currentTile.PosPath;
 
                 targetIndex++;
                 if (targetIndex >= _paths.Length)
                 {
                     yield break;
                 }
                 currentTile = _paths[targetIndex].Neighbor;               
             }
                
             //character controller             
             _motor.MoveToPoint(_paths[targetIndex].Direction);
 
             yield return null;
         }
     }

Function for the charatcer controler in the _motor class

 public void MoveToPoint(Vector3 direction)
     {
         Debug.Log("move : " + direction);
         //_isGrounded = Physics.CheckSphere(GroundCheck.position, GroundDistance, Groundmask);
         //temp
         _isGrounded = true;
 
         if (_isGrounded && _velocity.y < 0)
         {
             _velocity.y = -2f;
         }
        
         _controller.Move(direction * Speed * Time.deltaTime);
 
         _velocity.y += Gravity * Time.deltaTime;
 
         _controller.Move(_velocity * Time.deltaTime);
     }

Good Day,