I need an expert with the TweenService? My script got stuck!

Sorry for my bad english, i have write this script ->

local debounceimpostazioni = false
local function OnClickImpostazioni()
    if not debounceimpostazioni then
        debounceimpostazioni = true
        if ShopGUI.Position == UDim2.new(0.601, 0,0.706, 0) then
            if Sfondo.Position == UDim2.new(0.601, 0,0.956, 0) then
                if Audio.Position == UDim2.new(0.226, 0,0.11, 0) then
                    if Gamepasses.Position == UDim2.new(0.483, 0, 1, 0) and Petss.Position == UDim2.new(0.726, 0, 1, 0) then
                        local ImageTween = TweenService:Create(Sfondo,Animation,SfondoBack)
                        local ImageTween2 = TweenService:Create(Audio,Animation,AudioBack)
                        ImageTween2:Play()
                        ImageTween2.Completed:Wait()
                        ImageTween:Play()
                        ImageTween.Completed:Wait()
                    else
                        local ImageTween = TweenService:Create(Audio,Animation,AudioBack)   
                        ImageTween:Play()
                        ImageTween.Completed:Wait()
                    end
                else
                    local ImageTween = TweenService:Create(Audio,Animation,AudioTarget) 
                    ImageTween:Play()
                    ImageTween.Completed:Wait()
                end
            else
                local ImageTween = TweenService:Create(Sfondo,Animation,SfondoTarget)
                local ImageTween2 = TweenService:Create(Audio,Animation,AudioTarget)    
                ImageTween:Play()
                ImageTween.Completed:Wait()
                ImageTween2:Play()
                ImageTween2.Completed:Wait()
            end
        end
    end
    debounceimpostazioni = false
end
Impostazioni.MouseButton1Click:Connect(OnClickImpostazioni)

I Need press 2 times for open a GUI, why?

https://www.youtube.com/watch?v=xHtcruovfUY&feature=youtu.be

You can check inside the video i press it 2 times for close the gui