Unity createNew Game Object after calling a Destroy()

Hello all,

I'm having a weird issue with unity. When destroying GameObjects Unity creates a "New Game Object" GameObject into the outliner when the game is still running.

Here is my destroy call :

 private void DestroyBlock()
     {
        if (this.gameObject.transform.parent.gameObject)
         {
             gameController.RemoveBlockInMap(id);
             Destroy(this.gameObject.transform.parent.gameObject);
         }
     }
 
     void FixedUpdate () {
         if (blockCountAround != 8) {
           Invoke("DestroyBlock", lifeDuration);
         }
         else
         {
             CancelInvoke("DestroyBlock");
         }
         transform.Rotate(0.0f, Time.deltaTime * rotationSpeed, 0.0f);
     }

Here is the problem ingame :

Each time I destroy a GameObject "PRE_BlockCoin" Unity creates me a "New Game Object".

Thanks,