How do I improve this pathfinding script? The zombies only go to the delayed player position.

Script:

local pathfindingservice = game:GetService("PathfindingService")
local path = pathfindingservice:CreatePath()
local Zombie = script.Parent
local target
local player = game.Players:GetPlayers()[math.random(1,#game.Players:GetPlayers())]
if workspace:FindFirstChild(player.Name) then
	local char = workspace:FindFirstChild(player.Name)
	if char.Humanoid.Health > 0 then
		target = char
	end
end
local function changeTarget()
	local player = game.Players:GetPlayers()[math.random(1,#game.Players:GetPlayers())]
	if workspace:FindFirstChild(player.Name) then
		local char = workspace:FindFirstChild(player.Name)
		if char.Humanoid.Health > 0 then
			target = char
		end
	end
end

local function chaseTarget()
	if game.ReplicatedStorage:FindFirstChild(target.Name) then
		local goalPos = game.ReplicatedStorage[target.Name].Value
		local human = Zombie.Humanoid
		local torso = Zombie.Torso
		path:ComputeAsync(torso.Position, goalPos)
		local waypoints = path:GetWaypoints()
		for i, waypoint in pairs(waypoints) do
			if waypoint.Action == Enum.PathWaypointAction.Jump then
				human:ChangeState(Enum.HumanoidStateType.Jumping)
			end
			human:MoveTo(waypoint.Position)
			if target.Humanoid.Health <= 0 then
				changeTarget()
			end
			human.MoveToFinished:Wait()
		end
	end
end
while wait() do
	chaseTarget()
end