Punching script works only once and then it doesn't work anymore, how do i fix it?

So im making a fighting game and I have this script that seems to run well, but only works once. Also, the output doesn't show any error so I don't know what is wrong.

This script below is in StarterCharacterScripts

--// Services
local UserInputService = game:GetService('UserInputService')
local ReplicatedStorage = game:GetService('ReplicatedStorage')
local Players = game:GetService('Players')
 
--// Debounces
local Punching = false
local Damaging = true
 
--// Customisation
local Damage = 15
local Cooldown = 0.8
	 
--// Events
local PunchEvent = ReplicatedStorage:WaitForChild('PunchEvent')

--// Player
local Player = game.Players.LocalPlayer
local Character = game.Workspace:WaitForChild(Player.Name)
local Humanoid = Character:FindFirstChildOfClass('Humanoid')
local RightArm = Character:WaitForChild('Right Arm')
 
--//Animations
Punch = Instance.new('Animation')
Punch.AnimationId = 'rbxassetid://6290637671'
PunchTrack = Humanoid:LoadAnimation(Punch)
 
--// Coding
UserInputService.InputBegan:Connect(function(Input)
	if Input.KeyCode == Enum.KeyCode.E and not Punching then
        Punching = true
        PunchTrack:Play()
	    PunchTrack.KeyframeReached:Connect(function(Keyframe)
			if Keyframe == 'End' then
			   wait(Cooldown)
			   Punching = false
			   Damaging = true
			end
		end)
	end
end)

RightArm.Touched:Connect(function(hitPart)
	if Punching and hitPart.Parent:FindFirstChild('Humanoid') and Damaging 
then
	    Damaging = false
	    local HumanoidToDamage = hitPart.Parent:FindFirstChild('Humanoid')
	    PunchEvent:FireServer(HumanoidToDamage, Damage)
	end
end)