Description
Environment
Clean install with Nuxt v3.14.159 and sass or sass-embedded package installed.
Reproduction
Try to change foo mixin in styles/default.scss file: add or remove rules inside it.
On each change you will see that app.vue is not updated, page reload is not helping and it error hydration mismatches.
It works again if you manually change .vue file.
But it will break if you again change the .scss file.
Describe the bug
Without module attribute on <style> Nuxt correctly handles updates to .scss files that are imported via @use ... at-rule.
However, with module attribte it fails to watch changes to style files or something else breaks with hydration mismatches related to hashed class names so only making manual changes to .vue file will re-sync the updates.
It is also not related to flexible path options when using @use. The bug occurs no matter how you use style files: with .scss extension and without it, omitting _ at the beginning or not.