Character physics glitch

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1

After it’s done doing an attack, the movement becomes glitched. It does use welding in the attack but it deleted/disabled the welding & parts after it’s done. Does anyone know why this glitch is happening?

Code 
local part = folder:FindFirstChildOfClass("Part")
if not part then return end
local opart = part
if typeof(position) == "Instance" then
	part = position
else
	local osize = part.Size
	part = Instance.new("Part")
	part.Anchored = true
	part.CanCollide = false
	part.Transparency = 1
	part.Position = position
	part.Size = Vector3.new(0.1,0.1,0.1)
	part.Parent = parent or Camera
end
local weld = nil
if lookvector and basepart then
	local cf = CFrame.new(part.Position, (basepart.CFrame * CFrame.new(0, 0, -100)).p) * lookvector
	part.CFrame = cf
	if offset then
		part.Position = (part.CFrame * offset).p
	end
	if weldto then
		local part0  = basepart.Parent:FindFirstChild(weldto)
		part.CanCollide = false
		part.Anchored = false
		weld = Instance.new("Weld")
		weld.Part0 = part0
		weld.Part1 = part

		--weld.C1 = cf
		if offset then
			--weld.C1 = offset
		end
		weld.C0 = weld.Part0.CFrame:Inverse()
		weld.C1 = weld.Part1.CFrame:Inverse()
		weld.Parent = part0
	else

	end

end
delay((emdur or 2) + 0.2, function()
	if weld then
		weld.Enabled = false
		--weld:Destroy()
		if part then
			part.Anchored = true
		end
	end
end)
delay((emdur or 2) + 1, function()

	if weld then
		weld:Destroy()
	end
	delay(0.1, function()
		part:Destroy()
		for i,v in pairs(list) do
			if v then
				v:Destroy()
				table.remove(list, i)
			end
		end
	end)
end)