Code works in Editor, not stand alone

Hey guys I need some help around something that seemed really simple… so I’m trying to find an empty element of an array and it works when I play in editor, but when I play as standalone game it doesn’t work (same occurs in the package). Any ideas why?

could you please provide more details?
you could use somthing like https://blueprintue.com/ to show more code to us

blueprintUE | PasteBin For Unreal Engine 4 Here’s the entire blueprint (also thank you for this link this website is awesome)

Someone pointed out to me that I needed to stop making a slot struct and just promote it to a variable with the default values. This worked out for me.