Devise sign_up ignores remember_me value - devise

Question

I'm just getting started with Devise. I have a:
class User < ActiveRecord::Base
# Include default devise modules. Others available are:
# :token_authenticatable, :encryptable, :confirmable, :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :validatable
# Setup accessible (or protected) attributes for your model
attr_accessible :email, :password, :password_confirmation, :remember_me
end
and I've altered my sign_up view to:
<h2>Sign up</h2>
<%= form_for(resource, :as => resource_name, :url => registration_path(resource_name)) do |f| %>
<%= devise_error_messages! %>
<div><%= f.label :email %><%= f.email_field :email %></div>
<div><%= f.label :password %><%= f.password_field :password %></div>
<div><%= f.label :password_confirmation %><%= f.password_field :password_confirmation %></div>
<div><%= f.label :contact_me %><%= f.check_box :contact_me %></div>
<div><%= f.label :remember_me %><%= f.check_box :remember_me %></div>
<div><%= f.submit "Sign up" %></div>
<% end %>
<%= render :partial => "devise/shared/links" %>
However, checking the POST response, I can see the remember_user_token set in Cookie: after sign-up whether I ticked "Remember me" or not. Anyone know why that is, and how to stop it?
By comparison, signing in only sets that cookie if the box is ticked, as expected.

Answer 1

I now that you are using for_for, but i use form_tag... Such code works on my project:
.form
= form_tag new_user_session_path do
= email_field_tag 'user[email]', nil, :placeholder => "Ваш e-mail", :required => true
= password_field_tag 'user[password]', nil, :placeholder => "Ваш пароль", :required => true
.submit-area
= submit_tag "Вход", :class => "orange-button"
= check_box_tag 'user[remember_me]', true
.login-link
Запомнить меня
So that part will work fine:
= check_box_tag 'user[remember_me]', true