CSS HMR not working with Vue + Pug + Tailwind CSS + Scss

[SilentDepth]

Describe the bug

Like #4588 but with Scss.

When using Vue + Pug + Tailwind CSS + Scss together, CSS HMR won't load styles generated by Tailwind CSS. New styles work after restarting Vite. No issue with vanilla HTML or CSS.

Reproduction

https://stackblitz.com/edit/vitejs-vite-7mqkx6?file=src/App.vue

Steps to reproduce

1. Run the repro. There should be a red rectangle at the center of the page.
2. At App.vue:3, replace bg-red-500 with other color (e.g. bg-blue-500).
3. Check the render result. The color should change but it doesn't.
4. Restart Vite, and the color now changes.

System Info

System:
  OS: Linux 5.0 undefined
  CPU: (8) x64 Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
  Memory: 0 Bytes / 0 Bytes
  Shell: 1.0 - /bin/jsh
Binaries:
  Node: 16.14.2 - /usr/local/bin/node
  Yarn: 1.22.19 - /usr/local/bin/yarn
  npm: 7.17.0 - /usr/local/bin/npm
npmPackages:
  @vitejs/plugin-vue: ^3.2.0 => 3.2.0 
  vite: ^3.2.0 => 3.2.0

Used Package Manager

npm

Logs

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Make sure this is a Vite issue and not a framework-specific issue. For example, if it's a Vue SFC related bug, it should likely be reported to vuejs/core instead.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.
• The provided reproduction is a minimal reproducible example of the bug.