Instance value in view is diplayed after page refresh(Production)

I'm using rails 2.3.4 & ruby 1.8.7

I'm trying to print a instance variable in my application.

The instance variable is getting initialized in a method in deal_portal/base_controller.rb, while the view is rendered from a method in deal_portal/mobile_controller. When I view the page, the value of instance variable is not present, but once the开发者_开发百科 page is refreshed the value is displayed.

What could be the cause of delay as this happens only in production

EDIT:

deal_portal/base_controller.rb

def validate_trans
  @voucher_urls = payment_info["voucher_urls"]
end

deal_portal/mobile_controller.rb

class DealPortal::MobileController < DealPortal::BaseController
  def payment_success
    render :template => "deal_portal/mobile/payment_success.html.erb"
  end
end

deal_portal/mobile_native_app_controller.rb

class DealPortal::MobileNativeAppController < DealPortal::BaseController     
  before_filter :validate_trans, :only => [:payment_success]
end

Now in the view file payment_success.html.erb after the puchase is made, the @voucher_urls is not displayed and after refreshing the page, it becomes visible.