AI phyics movement doesnt work

I am trying to make an AI who picks up blocks and brings them to appropriate container. For some reason my AI stops at random times sometimes he picks like 4 or 5 blocks and brings them to the container sometimes he managed to get 16 blocks in container. Can somebody check my script because i dont know why my AI just stops random at the times and doesnt want to pick up blocks. I tried to put Debug log in my if statemates to see if it goes in and it does. My AI goes in the if statemant but he still doesnt move.

[Header("AI Stats")] public float speed = 4.0f; public float diststop = 1f;

 bool bluePickedUp;
 bool redPickedUp;
 int blueBlockNumber=0;
 int redBlockNumber=0;

 [Header("Posude")]
 public Transform bluePosuda;
 public Transform redPosuda;

 [Header("Blocks")]
 public Transform blueBlock;
 public Transform redBlock;

 [Header("Text")]
 public Text blueBlockNumberText;
 public Text redBlockNumberText;

 private Rigidbody2D rb;

 [Header(" ")]
 public Transform hand;

 private Vector2 Position
 {
     get
     {
         return transform.position;
     }
     set
     {
         transform.position = value;
     }
 }
 private void Start()
 {
     rb = GetComponent<Rigidbody2D>();

     blueBlockNumberText.text = "Number of blue blocks in container is: " + blueBlockNumber;
     redBlockNumberText.text = "Number of red blocks in container is: " + redBlockNumber;
 }
 private void FixedUpdate()
 {
     if (bluePickedUp == false && redPickedUp == false) 
     {
         if (redBlockNumber >= blueBlockNumber) 
         {
             Target(blueBlock);
             Debug.Log("Blue block");
         }

         if(redBlockNumber < blueBlockNumber)  
         {
             Target(redBlock);
             Debug.Log("Red block");
         }
     }

     if (bluePickedUp == true)         {
         Target(bluePosuda);
         Debug.Log("Blue container");
     }

     if(redPickedUp == true)
     {
         Target(redPosuda);
         Debug.Log("red containter");
     }
 }
 void Target(Transform target)
 {
     float dist = Vector2.Distance(Position, target.position);
     float step = speed * Time.deltaTime;

     if (dist >= diststop)
     {
         Position = Vector2.MoveTowards(Position, target.position, step);
         rb.MovePosition(Position);
     }
 }

 private void OnTriggerEnter2D(Collider2D target)
 {
     if (target.CompareTag("Blue") && redBlockNumber >= blueBlockNumber && bluePickedUp == false && redPickedUp == false)
     {
         bluePickedUp = true;
         target.transform.position = hand.position;
         target.transform.parent = GameObject.Find("Hand").transform;
     }

     if (target.CompareTag("Red") && redBlockNumber < blueBlockNumber && bluePickedUp == false && redPickedUp == false)
     {
         redPickedUp = true;
         target.transform.position = hand.position;
         target.transform.parent = GameObject.Find("Hand").transform;
     }

     if (target.CompareTag("BluePosuda"))
     {
         bluePickedUp = false;
         blueBlockNumber++;
         blueBlockNumberText.text = "Broj plavih blokova u posudama je: " + blueBlockNumber;
         transform.eulerAngles = new Vector2(0, 180);
     }

     if (target.CompareTag("RedPosuda"))
     {
         redPickedUp = false;
         redBlockNumber++;
         redBlockNumberText.text = "Broj crvenih blokova u posudama je " + redBlockNumber;
         transform.eulerAngles = new Vector2(0, 0);
     }

 }

}