AddItemOwnership and stacks

[lasere200]

I am using AddItemOwnership to add items to the player and I notice that if I add a single energy cell at a time for example they don't stack even if they have the same onwneship. (last 2 images)

And If I add them all at once I can see a single one in my inventory until I drop it and the rest appear in it's place.
AddItemOwnership (first 5 images). It's just the first one that retains ownership.