ArgumentException: Invalid Socket with FakeIP

[NBG-Zorian]

Describe the bug
Requesting FakeIP for the second time (without restarting steam) will cause ArgumentException: Invalid Socket. If steam is restarted, then everything works fine. Reprodusable both in editor and builds.

To Reproduce
Steps to reproduce the behavior:

Just create fake relay server. For the first time it will be successful. It is possible to join, etc. Second time (after application is closed, or unity) it fails.

Calling Code
1.

SteamClient.Init(appID, asyncCallbacks);
SteamNetworkingSockets.RequestFakeIP(numberOfVirtualPorts);//for example 1 virtual port

2. Create fake sockets

SteamNetworkingSockets.CreateRelaySocketFakeIP<SteamTransportSocketManager>(virtualPort);//for example passing index 0

Do we have some kind of workaround or a way to do it differently?

[NBG-Zorian]

Still relevant. Have anyone encountered it? Maybe I am using FakeIP in a wrong way? Can find any information anywhere..
Help is appreciated.