Using bud vue empty app.css after build

Hi, i use the bud-vue extension, If i add this extension without added any futher bundle on bud.config file, the app.css generated after build is empty with no errors on build console.

If i simply remove from package.json the bud-vue extensions everything is good.

I tried with differente node version, same problem.

The problem seems the .scss files:

After installed bud-vue if i put a simply body{background:red} inside my app.scss the resulting app.css was empty.

If i rename app.scss to app.css every works.

I already installed @roots/bud-sass | bud.js

If i remove bud-vue from deps every works file also with scss file.

Any advice?