Attribute not updating properly

Help and Feedback Scripting Support
,
1

I’m making an inventory system and I recently implemented a maximum items per slot. When the amount exceeds this maximum number it should move on to the next slot and create a new stack there but when this happens my GetAttributeChangedSignal() event doesnt trigger. It triggers when it creates an item stack for the first time even tho its the same code.

this is my inventory script:

local fullStack = 5

local function addThingToInventory(Item, plr, addition)
	for _, slot in ipairs(plr.PlayerGui.Inventory.Main.InsideFrame.Slots:GetChildren()) do
		local item = slot:GetAttribute("Item") or "None"
		local amount = slot:GetAttribute("Amount") or 0
		
		if item == "None" then
			slot:SetAttribute("Item", Item)
			slot:SetAttribute("Amount", addition)
			return
		elseif item == Item and amount < fullStack then
			slot:SetAttribute("Amount", amount + addition)
			return
		end
	end
end

and this is where I detect changes:

slot:GetAttributeChangedSignal("Item"):Connect(function()
	print("new item")
	
	local newItem = slot:GetAttribute("Item")
	local newId = ItemIds[newItem]
	slot.Image.Image = "rbxassetid://"..tostring(newId)
	slot.Image.ImageTransparency = 0
end)

slot:GetAttributeChangedSignal("Amount"):Connect(function()
	print("new amount")
	
	local newAmount = slot:GetAttribute("Amount")
	slot.Amount.Text = newAmount
end)

If anyone knows the problem, please help