Sourcemaps don't point to correct line

[creativetags]

with sassc-rails I was used to inline comments like:

/* line 1415, app/assets/stylesheets/main.sass */
.footer-buttons {
  display: flex;
}

I don't get them with dartsass-rails but I figured out you can turn on sourcemaps with:
config.assets.debug = truein /config/environments/development.rb

I then enabled CSS source maps in Chrome dev tools settings and now I get a link to the sass file main.source.sass but the line number is like 13,000 when there are only 1,700 lines in that file.