Anim:Stop() does not work

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1

I have a punching script which pulls out fists when pressing a keybind, however, when I want to unequip the fists the animation track will not stop. I have attempted to debug this and it returns that it the animation is not playing as it should, but the player still holds his fists out. Here is my code:

local UIS = game:GetService("UserInputService")

local ReplicatedStorage = game:GetService("ReplicatedStorage")

local player = game.Players.LocalPlayer
local character = player.Character or player.CharacterAdded:Wait()
local root = character:WaitForChild("HumanoidRootPart")

local fistsAnim = Instance.new("Animation")
fistsAnim.AnimationId = "http://www.roblox.com/asset/?id=ID"
local fistsAnimtrack = character.Humanoid.Animator:LoadAnimation(fistsAnim)


local punchAnim1 = Instance.new("Animation")
punchAnim1.AnimationId = "http://www.roblox.com/asset/?id=ID"
-- old = 16244185015
local punchAnimtrack1 = character.Humanoid.Animator:LoadAnimation(punchAnim1)

local punchAnim2 = Instance.new("Animation")
punchAnim2.AnimationId = "http://www.roblox.com/asset/?id=ID"
local punchAnimtrack2 = character.Humanoid.Animator:LoadAnimation(punchAnim2)

local damage = 5
local debounce = 0.3
local keybind = Enum.KeyCode.X

local canPunch = false
local fistsOut = false

UIS.InputBegan:Connect(function(input, _gameprocessed)
	if input.KeyCode == keybind and not _gameprocessed then
		if not fistsOut then
			fistsOut = true
			print("Fists out true, ", fistsOut)
			fistsAnimtrack:Play()
			canPunch = true
			
			local punch = 0

			UIS.InputBegan:Connect(function(input, _gameprocessed)
				if fistsOut then
					if input.UserInputType == Enum.UserInputType.MouseButton1 and not _gameprocessed then
						if canPunch == true then
							canPunch = false
							if punch == 0 then
								punch = 1
								punchAnimtrack1:Play()
								ReplicatedStorage.Events.Punch:FireServer(damage)	
							elseif punch == 1 then
								punch = 0
								punchAnimtrack2:Play()
								ReplicatedStorage.Events.Punch:FireServer(damage)
							end
							wait(debounce)
							canPunch = true
						end
					end
				end

			end)
		else
			fistsOut = false
			canPunch = false
			fistsAnimtrack:Stop()
			print("Fists out false, ", fistsOut)
			print(character.Humanoid:GetPlayingAnimationTracks())
			print(fistsAnimtrack.IsPlaying)
		end
	end
end)