SOCIAL_AUTH_NEW_USER_REDIRECT_URL strange behaviour

[yetanotherape]

I want to redirect user to page where he came from, but if it is a new user I want to redirect him to special landing page.
If I set SOCIAL_AUTH_NEW_USER_REDIRECT_URL = '/landing/' and start login from /login/facebook/?next=/ — user will be redirected to / instead of /landing/.
Why?

[omab]

SOCIAL_AUTH_NEW_USER_REDIRECT_URL was being ignored if ?next=... was present, I've switched the ordering there since I think it's the correct behavior for new users.