route not found from link in email password reset

I' am trying use the password reset function of devise in a mobile application.
I'm calling http://{{url}}/auth/password, with
email ="my email"
redirect_url = "http://{{url}}/auth/password/edit" (where {url} is my server url)
I receive the email, but when I try the link inside it, I'm getting "Routing Error".

In my logs I have :
Completed 302 Found in 93ms (ActiveRecord: 2.9ms) so the redirection worked

and then
Started GET "/auth/password/edit" for ::1 at 2015-08-03 17:45:37 +0200
Processing by DeviseTokenAuth::PasswordsController#edit as HTML
Completed 404 Not Found in 3ms (ActiveRecord: 0.0ms)

ActionController::RoutingError (Not Found):
devise_token_auth (0.1.31) app/controllers/devise_token_auth/passwords_controller.rb💯in `edit'

If I subclass passwords_controller (in overrides/passwords_controller.rb), copy/paste almost all the code from the original devise passwords controller and add :
mount_devise_token_auth_for 'User', at: 'auth', controllers: {
passwords: 'overrides/passwords'
}
everything works fine.
Am I doing something wrong ? I just want the link to redirect on the classic devise page to reset password

I'm using Rails 4.2.1 and Devise 3.3

Start with devise_token_auth (0.1.31) app/controllers/devise_token_auth/passwords_controller.rb at line 100 and reproduce the GET to /auth/password/edit using the Rails 4.2.1 and Devise 3.3 setup described. Compare it with overrides/passwords_controller.rb and the passwords controller mapping; done means the email link reaches the classic Devise password-reset page without a 404.