t3_BombBehaviour_2_1_3.cs

...
private void Update()
{
    //if (!exploded)
    //    CheckOverlapping();
}
...
void FixedUpdate()
{
    Counting();
}
...
public void Explode()
{
    if (!exploded)
    {
        exploded = true;
        //Debug.Log("Explode");
        CheckOverlapping();

        //Spawn effect
        GameObject exEff = Instantiate(explosionEffect, transform.position, transform.rotation);
        exEff.transform.position = bombRoot.transform.position;
        exEff.transform.localScale = transform.localScale;
        exEff.SetActive(true);

        //Destroy this object
        Destroy(gameObject);
    }
}