Jekyll theme on Rails not displaying correct Main.css file

Question

Jekyll Theme: https://startbootstrap.com/theme/clean-blog-jekyll
Rails version: 5.2.8.1
Host: Heroku

I made changes to scss files and ran the following:

jekyll clean
bundle exec jekyll b
bundle exec jekyll s

The main CSS file is updated and it looks great locally.

However, when I push to prod the main.css file is not capturing some of the changes that I made.

Question:

Do I need to point to a different file? Do I need to deploy tasks in Heroku?

Any pointers would help.