Amazon login works partly

[Oleg]

I try to authorize my mobile application using oauth and using Amazon login.

If in my goodreads account Amazon account was unlinked - all works fine: I authorized in amazon and then goodreads suggest me to enter goodreads password for account with the same email.
But if amazon already linked, after authorization in amazon browser loads main goodreads.com url and nothing else. Doesn't call oauth_callback and doesn't use authroize=1 in url.

Is is bug or I do somthing wrong?

[Adam]

As far as I can tell the OAuth flow currently doesn't work with login via Facebook or Amazon. So far I've had to advise my users to simply try signing in again, and if the browser is already signed in then OAuth succeeds.