One user doesnt get refresh token, others work

I have a webapp, user authorize and the webapp fetch segment efforts. But one of the user can authorize, all good,  my web can retrieve user information and saves this, but then the user doesnt get refreshtoken when webapp ask for it, response is Bad request. all the other user works well. We have tried to: revoke app, delete user and reauthorize several times. Also Adjusted privacy, so all public, but no luck with this. This user had privacy set to private, and request to follow when first authorizing, I dont know if its matter. So, I will be glad if someone has a possible solution for this.