Custom Facebook Login Button Email BUG

Hi Guys.
The custom image in the facebook login is creating a huge issue in my WP.
The users that connect thru the custom button are getting signed up, but the e-mail is not being added to the database.

So now i have a few users that are registered and can login normally but they have no e-mail in their profile.

I'm attaching a img to show you what happened.

I also noticed that a few months ago and i switched back to the normal shortcode. Thought that it was fixed in the recent versions but the problem still happens.

Please take a look at this bug.