Why does the debounce fail sometimes?

The debounce on line 8 stops me from firing the attack more the once and allows me to fire it again in 5 on line 116. The debounce fails sometimes and allows me to fire the attack by repeatedly pressing Z. I have no idea why this happens please help.

Sorry about the script being so long, I felt that it would be best for you to see everything to be able to help me properly.

repeat wait() until game.Players.LocalPlayer.Character

local Player = game.Players.LocalPlayer

local weapon = Player.Character.weapon

local Mouse = Player:GetMouse()
local enabled = true

Mouse.KeyDown:connect(function(key)
if not enabled then
        return
    end

if key == "x" then
enabled = false

local AttackPart1 = Instance.new("Animation")
AttackPart1.AnimationId = "http://www.roblox.com/Asset?ID=382733312"
local animTrack1 = Player.Character.Humanoid:LoadAnimation(AttackPart1)
animTrack1:Play()

local Swing = game.ReplicatedStorage.SOUND.Swing:Clone()
Swing.Parent = Player.Character.Torso

wait()
Swing:Play()

local AttackPart2 = Instance.new("Animation")
AttackPart2.AnimationId = "http://www.roblox.com/Asset?ID=385127283"
local animTrack2 = Player.Character.Humanoid:LoadAnimation(AttackPart2)
animTrack2:Play()

local Swing2 = game.ReplicatedStorage.SOUND.Swing:Clone()
Swing2.Parent = Player.Character.Torso
Swing2.Pitch = 0.7

wait(0.25)
Swing2:Play()

debounce = false

for _, weaponSeg in pairs (weapon:GetChildren()) do
	
	if weaponSeg.ClassName == "Part" then 
		
	weaponSeg.Touched:connect(function(part)
	
	local Human = part.Parent:FindFirstChild("Humanoid")
	local Blocked = part.Parent:FindFirstChild("Blocking")
	
	if Human and not debounce and part.Parent ~= Player.Character and part.Parent.Name ~= "sword" and Blocked == nil then
		
		debounce = true
		Human:TakeDamage(math.random(20, 25))
		
		local Slice = game.ReplicatedStorage.SOUND.Slice:Clone()
		Slice.Parent = Player.Character.Torso
		
		wait()
		Slice:Play()
		
		local Blood = game.ReplicatedStorage.PARTICLES.Blood:Clone()
		Blood.Parent = part
		Blood.Enabled = true
		
		wait(0.4)
		Slice:Destroy()	
		Blood.Enabled = false
		
		wait(0.15)
		Blood:Destroy()
		
		
		elseif Human and not debounce and part.Parent ~= Player.Character and Blocked then
		
		debounce = true
		Human:TakeDamage(math.random(2, 5))
		
		local Clash = game.ReplicatedStorage.SOUND.Clash:Clone()
		Clash.Parent = Player.Character.Torso
		
		wait()
		Clash:Play()
		
		local Sparks1 = game.ReplicatedStorage.PARTICLES.Sparks1:Clone()
		Sparks1.Parent = part
		Sparks1.Enabled = true
		
		local Sparks2 = game.ReplicatedStorage.PARTICLES.Sparks2:Clone()
		Sparks2.Parent = part
		Sparks2.Enabled = true
		
		wait(0.6)
		Clash:Destroy()
		Sparks1.Enabled = false
		Sparks2.Enabled = false
		
		wait(0.15)
		Sparks1:Destroy()
		Sparks2:Destroy()
		
end
	end)
		end
			

Swing:Destroy()
end
wait(2)
debounce = true

end

wait(5)
enabled = true
	end)