My debounce not work? Work only my first function

Hi guys, sorry for bad english.

This script work only the first time, after stop working, like an infinite Debounce

This is only a little part of my script. Work only the first function (?Maybe because i use the same debounce?) Is better if i use the _G. debounce?

local Phere2 = workspace.StartPhere['Complimenti!']:WaitForChild("2")
local Phere3 = workspace.StartPhere['Complimenti!']:WaitForChild("3")
local Phere4 = workspace.StartPhere['Complimenti!']:WaitForChild("4")

local debounce = false

local function OnTouch2()
	if not debounce then
	debounce = true
		if player.leaderstats.PhereStage.Value == 1 then
		ShowMessage:Fire("Complimenti! Hai superato la fase 1 della Obby di Phere!", true)
		sound:Play()
		wait (.5)
		debounce = false
		end
	end
end
Phere2.Touched:Connect(OnTouch2)

local function OnTouch3()
	if not debounce then
	debounce = true
		if player.leaderstats.PhereStage.Value == 2 then
		ShowMessage:Fire("Complimenti! Hai superato la fase 2 della Obby di Phere!", true)
		sound:Play()
		wait (.5)
		debounce = false
		end
	end
end
Phere3.Touched:Connect(OnTouch3)

local function OnTouch4()
	if not debounce then
	debounce = true
		if player.leaderstats.PhereStage.Value == 3 then
		ShowMessage:Fire("Complimenti! Hai superato la fase 3 della Obby di Phere!", true)
		sound:Play()
		wait (.5)
		debounce = false
		end
	end
end
Phere4.Touched:Connect(OnTouch4)

EDIT: "You not change the PhereStage.Value, for this not work!"

ERROR, i change it with a script inside the Object

function Pherestage(hit)
if hit.Parent ~= nil then
local player = game.Players:playerFromCharacter(hit.Parent)
	if player ~= nil then
		if player.leaderstats.PhereStage.Value == script.Parent.Name - 1 then
		local plr = hit.Parent:FindFirstChild("Humanoid")
			if plr ~= nil then
				wait(0.2)
				player.leaderstats.PhereStage.Value = script.Parent.Name
				end 
			end 
		end 
	end
 end
end

script.Parent.Touched:connect(Pherestage)