[SOLVED] Existed prefab countdown timer bar resetting it's value back to begining after i instantiate a new one.

So i had countdown timer bar prefab which instantiated in vertical layout group. It's work perfectly fine for the 1st time, the timer will reducing as it should be. But when i instantiate more, the old one will resetting it's value back to beginning.

 public class CountDownTimerBar : MonoBehaviour
 {
     float maxTime;
     public static float runningTime;
     Image timerBar;
 
      void Awake()
     {
         maxTime = PlayerPrefs.GetFloat("SetPartyEsc");
         runningTime = maxTime;
         timerBar = GetComponent<Image>();
     }
 
     void Update()
     {
         if (runningTime > 0)
         {
             runningTime -= Time.deltaTime;
             timerBar.fillAmount = runningTime / maxTime;
         }
     }
 }

This is my instantiate script :

 public GameObject cardPrefab;
     public GameObject menu;
     public float addHeigthValue = 190f;
     private VerticalLayoutGroup layout;
     private RectTransform rt;
 
     void Start()
     {
         layout = GetComponent<VerticalLayoutGroup>();
         rt = GetComponent<RectTransform>();
     }
 
     public void AddaCard()
     {
         if(rt.transform.childCount < 4)
         {
             Instantiate(cardPrefab, layout.transform);
             CloseMenu();
         }
         else if(rt.transform.childCount >= 4)
         {
             Instantiate(cardPrefab, layout.transform);
             rt.sizeDelta = new Vector2(rt.sizeDelta.x, (rt.sizeDelta.y + addHeigthValue));
             CloseMenu();
         }              
     }
 
     public void CloseMenu()
     {
         menu.gameObject.SetActive(false);        
     }

Here's some images...
It's working for 1st instantiate :

But when i instantiate another one...

Can anyone help me with this ?