Place the player Arms to he Initial Position

Help and Feedback Scripting Support
1

Hello, so I am editing an existing script to rotate the arm with the mouse position. But when I disconnect the RunService. I try something to return the arm to its original position. But I got these bugs. I don’t know how to solve it.
The Script :

function RotateArm()
	
	local connection
	
	local Players = game:GetService("Players")
	local RunService = game:GetService("RunService")

	local plr = Players.LocalPlayer
	local char = plr.Character or plr.CharacterAdded:Wait()
	local mouse = plr:GetMouse()

	mouse.TargetFilter = workspace

	local Torso = char:WaitForChild("Torso")
	local armOffset = Torso.CFrame:Inverse() * char["Right Arm"].CFrame
	local armWeld = Instance.new("Weld")
	local InitialPosition = char["Right Arm"].CFrame

	armWeld.Part0 = Torso
	armWeld.Part1 = char["Right Arm"]
	armWeld.Parent = char

	local lastmou
	
	connection = RunService.RenderStepped:Connect(function()
		lastmou = mouse.Hit.p
		local cframe = CFrame.new(Torso.Position, mouse.Hit.Position) * CFrame.new(0,0.5,-0.5) * CFrame.Angles(math.pi/2, 0, 0)
		armWeld.C0 = armOffset * Torso.CFrame:toObjectSpace(cframe)
	end)
	
	wait(3)
	
	connection:Disconnect()
	armWeld.C0 = InitialPosition
end

RotateArm()

The Video

2

Initial position should be armweld.C0 instead of the arm CFrame