moving object dissapears when it reaches it's destination

so I have an object that is supposed to move between two empty game object's transform.

public class MoveOntheSpot : MonoBehaviour { public Transform pos1, pos2, pos3; public float speed; public Transform startPos;

 Vector3 nextPos;

 // Start is called before the first frame update
 void Start()
 {
     nextPos = startPos.position;
 }

 // Update is called once per frame
 void Update()
 {
     if (transform.position == pos1.position) 
     {
         nextPos = pos2.position;
     }
     if (transform.position == pos2.position) 
     {
         nextPos = pos3.position;
     }
     if (transform.position == pos3.position) 
     {
         nextPos = pos1.position;
     }

     transform.position = Vector3.MoveTowards(transform.position, nextPos, speed * Time.deltaTime);
 }

 private void OnDrawGizmos()
 {
     Gizmos.DrawLine(pos1.position, pos2.position);
 }

}

It moves very slowly to the first position and when it hits the first position it suddenly dissapears from the players view.(I can still see it moving normally in the scene view)