Where should I put a debounce to prevent these remote events from firing multiple times?

Hi Scripting Helpers, this is a longer one.

I am trying to make a GUI inventory system very similar to the one in Soybeen's Booga Booga. I have gotten fairly close except that when you open the inventory multiple times and then try to drop or eat something, the amount of items eaten or dropped will equal the number of times you opened the inventory.

So if I open the inventory only once, it works exactly how I want it to, but if I close the inventory and re-open it, when you try and drop something it will drop 2 items instead of one. If I close and reopen it again it will drop 3 items and so on. This is due to "C" key being pressed multiple times.

So basically I just don't know where the logical place to put the debounce is.

I am using the following code.

--LOCAL SCRIPT

userInputService = game:GetService("UserInputService")
player = game.Players.LocalPlayer
playerGUI = player:WaitForChild("PlayerGui")
-- The following 2 items are remote events
dropRequest = game.ReplicatedStorage.DropRequest
imageButtonActivated = game.ReplicatedStorage.InventoryImageButtonActivate
--GUI
inventoryHolderGui = playerGUI.InventoryScreenGui.InventoryHolderFrame
inventoryMainFrame = inventoryHolderGui.InventoryFrame
isInventoryOpen = false
inventoryContents = player.Inventory:GetChildren()

userInputService.InputBegan:Connect(function(input,gameProcessed)
    if input.KeyCode == Enum.KeyCode.C and isInventoryOpen == false then
        inventoryHolderGui.Visible = true
        isInventoryOpen = true
        local inventoryButtons = inventoryMainFrame:GetChildren()
        for i,v in pairs(inventoryContents) do
            for o,b in pairs(inventoryButtons) do
                if b.Name == v.Name then
                    if v.Value > 0 then 
                        b.Visible = true
                        b.AmountDisplay.Text = v.Name .. " : " .. tostring(v.Value)
                        b.MouseButton2Down:Connect(function()
                            --Problem may be here?
                            dropRequest:FireServer(v)
                        end)
                        b.MouseButton1Down:Connect(function()
                            --Problem may be here?
                            imageButtonActivated:FireServer(v)
                        end)
                        v.Changed:Connect(function(value)
                            if value > 0 then
                                b.Visible = true
                                b.AmountDisplay.Text = v.Name .. " : " .. tostring(v.Value)
                            elseif value <= 0  then
                                value = 0
                                b.Visible = false
                            end
                        end)
                    elseif v.Value <= 0 then
                        b.MouseButton2Down:Connect(function()
                            --Problem may be here?
                            dropRequest:FireServer(v)
                        end)
                        b.MouseButton1Down:Connect(function()
                            --Problem may be here?
                            imageButtonActivated:FireServer(v)
                        end)
                        v.Changed:Connect(function(value)
                            if value > 0 then
                                b.Visible = true
                                b.AmountDisplay.Text = v.Name .. " : " .. tostring(v.Value)
                            elseif value <= 0  then
                                value = 0
                                b.Visible = false
                            end 
                        end)
                    end
                end
            end
        end
    elseif input.KeyCode == Enum.KeyCode.C and isInventoryOpen == true then
        inventoryHolderGui.Visible = false
        isInventoryOpen = false
    end
end)

--SERVER SCRIPT

dropRequest = game.ReplicatedStorage.DropRequest
imageButtonActivated = game.ReplicatedStorage.InventoryImageButtonActivate
player = game.Players.PlayerAdded:Connect(function(plr)
    return plr
end)

dropRequest.OnServerEvent:Connect(function(player,pickupIntValue,inventoryOpenedTimes)
    local inventoryContents = player.Inventory:GetChildren()
    local PickupsContents = game.ServerStorage.Pickups:GetChildren()
    for i,v in pairs(inventoryContents) do
        if v.Name == pickupIntValue.Name then
            v.Value = v.Value - 1
        end
    end
    for i,v in pairs(PickupsContents) do
        if v.Name == pickupIntValue.Name then
            local droppedItem = v:Clone()
            droppedItem.Parent = game.Workspace
            droppedItem.CFrame =                            player.Character.Head.CFrame:ToWorldSpace(CFrame.new(-4,0,0))
        end
    end
end)

imageButtonActivated.OnServerEvent:Connect(function(player,value)
    if value.Name == "Apple" then
        value.Value = value.Value - 1
    elseif value.Name == "Bread" then
        value.Value = value.Value - 1
    end
end)

Thanks for the help!