Use proxy or Tor in Heroku rails app to hide IP address

I use Mechanize inside the rake task, which is launched by the scheduler add-in for my ruby ​​Heroku application. In the script, I went to a web page that worked until recently, when the script could no longer log in. When I started debugging, Mechanize shows different form fields when I run the script in heroku console than on my local console.

Local console ruby shows these fields:

>> asf.fields.each do |f| puts f.name end
__VIEWSTATE
__PREVIOUSPAGE
__EVENTVALIDATION
login$field
password$field

The Heroku console shows one additional field that is NOT displayed in the html source:

>> asf.fields.each do |f| puts f.name end
__VIEWSTATE 
__PREVIOUSPAGE
__EVENTVALIDATION
login$field
password$field
captcha$txtCaptcha

When I go out:

>> asf.click_button

Update: . , IP- Heroku . - Tor, IP ?