UserInputService and other In- Game events Stops working after the first player, why is that?

In a local script(game.StarterPlayer.StarterCharacterScripts.LocalScript), I put this:

local UserInputService = game:GetService("UserInputService")
Print("Local Script")
function Began(Input)
	Print(Input)
end
function Ended(Output)
	Print(Output)
end
UserInputService.InputBegan:Connect(Began)
UserInputService.InputEnded:Connect(Ended)

For the first Player this is the output:

Local Script
Input
Output

For the second Player this is the output:

Local Script

Btw, I have tested this with other people as well as myself

You haven't done

local UserInputService = game:GetService("UserInputService")

If that isn't the case then I'm not sure.