[BUG] sass:compile + postcss => Loads CSS File Twice

[mario-amazing]

Description

In a Rails default app setup, the CSS file is loaded twice, resulting in both application.css and application-[digit].css being loaded.

Steps to Reproduce

1. Create a new Rails app with the following setup:

   rails new newapp --css=bootstrap --javascript=esbuild -a propshaft --master

2. Generate a scaffold for books:

   rails g scaffold books title:string author:string publication_year:integer

3. Start the server and navigate to the application in your browser.
4. Inspect the sources in the browser's developer tools.

Expected Behavior

Only one version of the CSS file application-[digit].css should be loaded.

Actual Behavior

Both application.css and application-[digit].css are loaded.

Additional Information

• Rails version: 7 and 8
• Ruby version: 3.3

[mario-amazing]

This is a Google Chrome feature, there is only one css file on the web