Enemy Line of Sight Help Needed

I am making a 2d top-down stealth game and I have an enemy character that patrols waypoints. I have a 2Draycast that looks in the direction that the enemy is looking. The problem is that once my enemy character reaches the waypoint, the raycast just disappears. I have a feeling my direction variable is the reason why this is happening, but what alternatives do I have to ensure the 2Draycast faces in the direction faces in the direction the enemy is facing and that it does not disappear?

 void CanSeePlayer(){
         direction = (moveSpots[nextPosition].position - transform.position).normalized;
         RaycastHit2D hit = Physics2D.Raycast(transform.position, direction, distance);
         Debug.DrawLine(transform.position, transform.position + direction * distance, Color.blue);
     }

And below will be my patrol function, which may be helpful for anyone answering.

 void Patrol(){
         transform.position = Vector2.MoveTowards(transform.position, moveSpots[nextPosition].position, speed * Time.deltaTime);
 
         if (Vector2.Distance(transform.position, moveSpots[nextPosition].position) < 0.5f)
         {
             if (waitTime <= 0){
                 nextPosition = (nextPosition+1) % moveSpots.Length;
                 waitTime = startWaitTime;
             } 
             else{
                 waitTime -= Time.deltaTime;
             }
                 
         }
     }

Both are called in Update.