Anonymous local

dose anyone know why when you use anoymous local it really doesn’t not hidden you. because if you turn on Anonymous local and choose whatever you wanted to. and then go on like ip looked up. it still show you’re real Ip addressed. so I don’t know it should be doing that. or is it a bug. because the hole this of anonymous local is to hidden you. not leak you. but if i am wrong. please so say. or if someone can help me out with this. because it is piss me off where i just noticed my IP is being leaks way ever if I turn it off