The position of the attachment changes, but the beam that is attached to the attachment does not appear

[LendeRBrooss (wakeupf1lthy)]

I have an attachment that, when the function is called, should move to the position of another attachment, thereby showing the beam, but the attachment moves and the beam is not shown

function module.AppairLightsaber(char)
	local lightsaber = workspace:FindFirstChild("Core").Lightsabers:FindFirstChild(char.Name);
	if char then
		if lightsaber then
			local startatt = lightsaber:FindFirstChild("Blade"):FindFirstChild("Glow").Start;
			local moveatt = lightsaber:FindFirstChild("Blade"):FindFirstChild("Glow").Move;
			local endatt = lightsaber:FindFirstChild("Blade"):FindFirstChild("Glow").End;
			local blade = lightsaber:FindFirstChild("Blade"):FindFirstChild("Blade");
			local lightpoint = lightsaber:FindFirstChild("Blade"):FindFirstChild("Glow").Light;
			game:GetService("TweenService"):Create(blade,TweenInfo.new(.1),{Transparency = 0}):Play();
			for i = 0,1,.1 do
				local movepos = lerp(startatt.WorldPosition,endatt.WorldPosition,i);
				moveatt.WorldPosition = movepos;
				task.wait();
			end
			lightpoint.Enabled = true;
		end
	end
end

[LendeRBrooss (wakeupf1lthy)]

hahaha this is a bug of roblox studio everything works in the game =)