Animation stops half way threw

Help and Feedback Scripting Support
#1 
local userInputService = game:GetService("UserInputService")
local player = game.Players.LocalPlayer
local animation = Instance.new("Animation")
animation.AnimationId = "rbxassetid://16188791182"
local isplaying = false
local plr = game.Players.LocalPlayer
local replicatedStorage = game.ReplicatedStorage
local fireBlast = replicatedStorage.fireBlast
player.CharacterAdded:Wait()

local ClassicSword = player.Backpack.ClassicSword

local toolEquipped = false

local function onToolEquipped()
	toolEquipped = true
end

local function onToolUnequipped()
	toolEquipped = false
end


local function onKeyPress(input)
	local direction = workspace.CurrentCamera.CFrame.LookVector
	if input.KeyCode == Enum.KeyCode.R then
		if isplaying == false and toolEquipped then
			
			isplaying = true
			local char = plr.Character or plr.CharacterAdded:Wait()
			local humanoid = char:WaitForChild("Humanoid")
			local animplay = humanoid:LoadAnimation(animation)
			animplay:Play()
			animplay.Stopped:Connect(function()
				isplaying = false
			end)
			fireBlast:FireServer(direction)
		end
	end
end

userInputService.InputBegan:Connect(onKeyPress)
ClassicSword.Equipped:Connect(onToolEquipped)
ClassicSword.Unequipped:Connect(onToolUnequipped)

my animation stops half way threw.

#2

You can try loading the animation outside and before the onkeypress function. The code loads the animation every time the key is pressed. This might cause a delay before the animation plays, causing it to not play correctly. This happens because it takes time to load the animation over and over again.