Could you please explain what you have done and how you came to your conclusion?
I'd guess you did have a succesful authentication with the provider, logged in the user, redirected to the page saying 'yay, you just logged in' and then found the user not to be logged in. If my assumption is true, it could be helpful to log a user in without Socialite and see it that works. If it does, we can look close at Socialite, if dit doesn't, at least we know that this isn't Socialite specific.