Follow steps:

1 Auth with device: player will be created, it's OK

2 Connect Facebook: new player will be created O_O

Parameter "doNotLinkToCurrentPlayer" is setted to "false"

I revert my project to the time when everything worked ok, but problem still exists

It means a bug on the server side

i'm using Unity3d SDK

The code is something like this:

public class UserProfile : MonoBehaviour {
    [System.NonSerialized] public string cloudUserId = "";
    [System.NonSerialized] public bool isFacebookUser = false, isTwitterUser = false;
    [System.NonSerialized] public string accessTokenFacebook = "";

    bool _gsStartAuthorize = false;
    void Awake(){
        ProfileEvents.OnLoginFinished += SoomlaLoginReciever;
    }
    void SoomlaLoginReciever(Soomla.Profile.UserProfile UserProfile, string payload){
        if (SoomlaProfile.IsLoggedIn(Provider.FACEBOOK)) {
            accessTokenFacebook = FB.AccessToken;
            LoginWithFacebook();
        }
        if (SoomlaProfile.IsLoggedIn(Provider.TWITTER)) {
            isTwitterUser = true;
        }
    }
    void Update(){
        if (!_gsStartAuthorize && GS.Available){
            _gsStartAuthorize = true;
            AuthInit();
        }
    }
    void AuthInit(){
        if (isFacebookUser){
            LoginWithFacebook();
        }
        else {
            DeviceAuth();
        }
    }
    void LoginWithFacebook(){
        if (accessTokenFacebook == ""){return;}
        new FacebookConnectRequest().SetAccessToken(accessTokenFacebook).Send((response) => {
            if (response.HasErrors){
                isFacebookUser = false;
                Debug.LogError("Acces token is OOOOLD");
                accessTokenFacebook = "";
                DeviceAuth();
            }
            else {
                isFacebookUser = true;
            }
        });
    }
    void DeviceAuth(){
        new DeviceAuthenticationRequest().Send((response) => {
        });
    }
    public void Login(Provider provider){
        SoomlaProfile.Login(
            provider,
            "",
            new BadgeReward("loggedIn", "Logged In!")
        );
    }
}

 

Ahh, i'm forgot about clearing externalAuthentication collection during testing

Now all works perfect, i beg your pardon