this sprint works but once a player dies it stops working why is that??

wait(2)

local Player = game.Players.LocalPlayer
local UIS = game:GetService("UserInputService")
local Humanoid = Player.Character.Humanoid

UIS.InputBegan:Connect(function(input, GameProcessedEvent)
    if input.KeyCode == Enum.KeyCode.LeftShift then
        Humanoid.WalkSpeed = 50
    end
end)

UIS.InputEnded:Connect(function(input, GameProcessedEvent)
    if input.KeyCode == Enum.KeyCode.LeftShift then
        Humanoid.WalkSpeed = 16
    end
end)