Stuck in a coroutine while loop

I am trying to make a dice game where when I click a button, a number between 1 to 6 is generated. The player will be moved (using IEnumerator) according to the number rolled.

The board is a square with a trigger collider above it for the player to check if it is movable in that direction. When the player reached the corner of the board, it will rotate 90 degree and is supposed to continue on to another direction, but the player will only move 1 block after it is rotated and the IEnumerator will be stuck in a while loop even though the player's transform.position is the same as endPos.

Any form of help will be appreciated.

 protected IEnumerator Move(int zDir)
     {
         moving = true;
 
         RaycastHit hit;
         Physics.Raycast(transform.position, transform.forward, out hit, 1.0f);
         
         if (hit.collider == null)
         {
             transform.Rotate(0f, 90f, 0f);
             Physics.Raycast(transform.position, transform.forward, out hit, 1.0f);
             Debug.Log("Rotated");
             yield return null;
         }
 
         Vector3 startPos = transform.position;
         Vector3 endPos = startPos + transform.TransformDirection(0f, 0f, zDir);
         Debug.Log(endPos);
 
         if (hit.collider != null)
         {
             float sqrRemainingDistance = (transform.position - endPos).sqrMagnitude;
             
             while(sqrRemainingDistance > float.Epsilon)
             {
                 Debug.Log("Moving");
 
                 Vector3 newPostion = Vector3.MoveTowards(rb.position, endPos, moveTime * Time.deltaTime);
                 
                 rb.MovePosition (newPostion);
                 
                 sqrRemainingDistance = (transform.position - endPos).sqrMagnitude;
                 
                 yield return null;
             }
             gameManager.num--;
             moving = false;
         }
 
 void Update()
     {
         Debug.DrawRay(transform.position, transform.forward);
 
         if (gameManager.num > 0 && !moving)
         {
             StartCoroutine(Move(1));
         }
     }