UnityEvren issue

I didn't find anything on the net, so maybe I just overlook something.
I wrote an OnEnabledDo script that executes an UnityEvent when triggered.
This works nice and dandy... until I execute the same function on two similar scripts on one GameObj, e.g. calling AddItemToInventory.Add() in two components. Like this:

Code (CSharp):

1. namespace Freeman
2. {
3.     public class AddItemToInventory : MonoBehaviour
4.     {
5.         public ItemData itemData;
6.         public float waitTimeBeforeAdd;
7.  
8.         DialogHandler dialogHandler; // just to execute the coroutine here, because this node might be disabled before wait time ends.
9.  
10.         public void AddItem()
11.         {
12.             if (!enabled) return;
13.             if (dialogHandler) dialogHandler.StartCoroutine(CoAdd());
14.             else StartCoroutine(CoAdd());
15.         }
16.  
17.  
18.         void Awake()
19.         {
20.             dialogHandler = GetComponentInParent<DialogHandler>();
21.         }
22.  
23.         void Start()
24.         {
25.             // allows to disable component
26.         }
27.  
28.  
29.         IEnumerator CoAdd()
30.         {
31.             //
32.             yield return new WaitForSeconds(waitTimeBeforeAdd);
33.             Inventory.me.CreateAndAddItem(itemData);
34.             InfoText.me.ShowText("You received " + itemData.itemName);
35.         }
36.  
37.     }
38. }

used like this:


If I do this, only the first AddItem() is executed.