Error on re-joining a match with NetworkLobbyManager

Hi, I am using the standard NetworkLobbyManager, and I am getting this error:

ArgumentException: An element with the same key already exists in the dictionary. System.Collections.Generic.Dictionary`2[UnityEngine.Networking.Types.NetworkID,UnityEngine.Networking.Types.NetworkAccessToken].Add (NetworkID key, UnityEngine.Networking.Types.NetworkAccessToken value) (at /Users/builduser/buildslave/mono-runtime-and-classlibs/build/mcs/class/corlib/System.Collections.Generic/Dictionary.cs:404)...

Error on re-joining a match with NetworkLobbyManager