PUN v1.80 NotImplementedException when switched auth mode to "AuthOnce" on WP8.1

Ondrish

Hi,

I am getting this exception after I switched auth mode to AuthOnce and deployed to windows phone 8.1 device.

NotImplementedException: The method or operation is not implemented.
at ExitGames.Client.Photon.PeerBase.InitEncryption(Byte[] secret)
at ExitGames.Client.Photon.EnetPeer.InitPeerBase()
at ExitGames.Client.Photon.EnetPeer.Connect(String ipport, String appID, Object custom)
at ExitGames.Client.Photon.PhotonPeer.Connect(String serverAddress, String applicationName, Object custom)
at NetworkingPeer.ConnectToRegionMaster(CloudRegionCode region)
at PhotonNetwork.ConnectToRegion(CloudRegionCode region, String gameVersion)
at NetworkManager.d__5.MoveNext()
at UnityEngine.Internal.$MethodUtility.$Invoke1217(Int64 instance, Int64* args)
at UnityEngine.Internal.$MethodUtility.InvokeMethod(Int64 instance, Int64* args, IntPtr method)
(Filename: Line: 0)

AuthOnce works in editor and it works when deployed to android device.
Using:
PUN v1.80
Unity 5.3.4f

When I use auth mode "Auth" it works on windows phone device as well.

I believe currently used dll is from Metro folder. Am I missing something? Should I use some other dll that contains this implementation?