Why is this event triggering multiple times?

Hi, I am brand new to scripting. I am having trouble with a gui button firing multiple times. When the button is pressed the first time, the code runs once. the second press runs the code twice. the third press runs the code 3 times.

Local Script in Gui (Line 49 is the source of my problem from what i could tell):

local replicatedStore = game:WaitForChild("ReplicatedStorage")
local dropItem = replicatedStore:WaitForChild("dropItem")
local UIS = game:GetService("UserInputService")

local player = game.Players.LocalPlayer
local mouse = player:GetMouse()
local inventory = player.Inventory

local mainGui = script.Parent
local inventoryGui = mainGui.GUI
local interactGui = player.PlayerGui:WaitForChild("interactGui")

local fullGui = player.PlayerGui:WaitForChild("fullInventory")
local maxSlots = 4
local currentSlots = script.Parent.currentSlots

for i, itemValue in pairs(inventory:GetChildren()) do
	itemValue.Quant.Changed:Connect(function()
		local itemGui = inventoryGui.itemList:FindFirstChild(itemValue.Name)
		if itemGui then
			itemGui.ItemQuantity.Text = itemValue.Quant.Value
			if itemValue.Quant.Value <= 0 then
				itemGui.Visible = false
			elseif currentSlots.Value <= maxSlots then
				itemGui.Visible = true
			end
		end
	end)
end

for i, itemButton in pairs(inventoryGui.itemList:GetDescendants()) do
	if itemButton:IsA("ImageButton") then
		itemButton.MouseButton2Up:Connect(function()
			local debounce = false
			interactGui.Frame.Position = UDim2.new(0, mouse.X, 0, mouse.Y)
			interactGui.Enabled = true
			local name = itemButton.Parent.ItemName.Text
			local Drop = inventory[name].Drop.Value
			local dropButton = interactGui.Frame.Drop
			interactGui.Frame.Info.Visible = true
			if Drop == true then
				interactGui.Frame.Drop.Visible = true
			else
				interactGui.Frame.Drop.Visible = false
			end
			local itemVal = inventory[name].Quant.Value
			if debounce == false then
				debounce = true
				dropButton.MouseButton1Down:Connect(function()
					if itemVal > 0 then
							local dropItem = dropItem:InvokeServer(name)
						if dropItem == true then
							if itemVal > 0 then
								itemButton.Parent.ItemQuantity.Text = itemVal
							else
								itemButton.Parent.ItemQuantity.Text = itemVal
								itemButton.Parent.Visible = false
							end
						end
					end
					wait(1)
					debounce = false
				end)
			end
		end)
	end
end

UIS.InputEnded:Connect(function(input)
	if input.UserInputType == Enum.UserInputType.MouseButton1 then
		if interactGui.Enabled == true then
			interactGui.Enabled = false
		end
	end
end)