Problem with Array

Hi again, i’m trying to make a way to spawn or not spawn Actors by Save, for example, if i pick up a coin in a level, that coin musn’t spawn again. This event is triggered when i collide with the Collectible actor from the current Level. I search the right struct (that contains the Level Name and an array of Transforms) and add the new transform. Maybe i’m not doing it the right way, but i want to try this method first, then i’ll see for something else. I don’t understand why AddUnique (even Add) node does not add the actor’s Transform into the array. Could it be because is from a Struct?

Hope for a prompt response. Thanks.

P.S. I hate the debug mode! i cannot see any important variable value!