WildStacker API 2025.1 setItemStack() didn't work

[steodec]

Minecraft's Version

• Papper: 1.21.4-R0.1-SNAPSHOT

Plugin's Version

• WildStacker: version 2025.1-b165
• WildStackerAPI: version 2025.1

Describe the bug

class ItemPickupListener : Listener {
    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
    fun onPickup(event: EntityPickupItemEvent) {
        val entity = event.entity
        val item: Item = event.item
        if (entity is Player) {
            val playerData = PlayerDataImpl.get(entity.uniqueId)
            if (!playerData.activated) return
            if (playerData.bag == "INVENTORY") return
            val bagIndex = playerData.bag.toIntOrNull() ?: return
            val itemStackCopy = item.itemStack.clone()
            val stackedItem = WildStackerAPI.getStackedItem(item)
            if (stackedItem != null) {
                stackedItem.itemStack = null
            } else {
                item.remove()
            }
            IslandChestsApi.addToBag(entity, itemStackCopy, bagIndex)
        }
    }
}

Hello,
I'm experiencing an issue with the method WildStackerAPI.getStackedItem(item).
No matter what I do, the returned itemStack is always the same, even if I set it to null or Material.AIR.
This makes it impossible to properly manage stacked items, as I can't detect when the stack is empty or removed.

To Reproduce

Steps to reproduce:

Get a stacked item using WildStackerAPI.getStackedItem(item)
Try to set its itemStack to null or Material.AIR
Observe that the returned value does not change
Expected behavior:
Set the item stack of the item. If null or air, the remove method will be called.

Additional Information

No response

[WarnDa]

Can confirm this.
It worked on older API, we updated the api and now we are getting dupe bug because of this

[OmerBenGera]

The implementation of setItemStack is as follows:

    @Override
    public void setItemStack(ItemStack itemStack) {
        if (itemStack == null || itemStack.getType() == Material.AIR)
            remove();
        else
            object.setItemStack(itemStack);
    }

Maybe bukkit's Item does not allow setItemStack to be called on the item, or something else changes this afterwards?
WStackedItem holds the Item entity, not an item stack.
Also, the item is removed in delay, not in the exact tick.

[OmerBenGera]

Any news regarding this?

[steodec]

I tried your solution, but the problem still persists. By default, without WildStacker, it works perfectly but with it, it doesn’t work.