Score sprites not reseting to zero after scene reloads.

Im using number sprites to display the ingame score but when the player scores above 10 or a hundred the sprite stays stuck at the previous score value only the unit value sprite resets back to 0 even though the actual score resets the sprites do not reset.

 public class ScoreManagerScript : MonoBehaviour
 {
     public static int Score { get; set; }
 
     void Awake()
     {
            (Tens.gameObject as GameObject).SetActive(false);
         (Hundreds.gameObject as GameObject).SetActive(false);
     }
 
     void Update()
     {
 
         if (previousScore != Score) 
         {
             if (Score < 10)
             {
                 Units.sprite = numberSprites[Score];
             }
             else if (Score >= 10 && Score < 100)
             {
                 (Tens.gameObject as GameObject).SetActive(true);
                 Tens.sprite = numberSprites[Score / 10];
                 Units.sprite = numberSprites[Score % 10];
             }
             else if (Score >= 100)
             {
                 (Hundreds.gameObject as GameObject).SetActive(true);
                 Hundreds.sprite = numberSprites[Score / 100];
                 int rest = Score % 100;
                 Tens.sprite = numberSprites[rest / 10];
                 Units.sprite = numberSprites[rest % 10];
             }
         }
 
     }
 
 
     int previousScore = -1;
     public Sprite[] numberSprites;
     public SpriteRenderer Units, Tens, Hundreds;
 }