css modules not built when building in watch mode

[danvoyce]

Describe the bug

When using css modules and running build --watch, the css file is not rebuilt when changed.

Reproduction

https://stackblitz.com/edit/vitejs-vite-kky48z?file=src%2FApp.module.css&terminal=dev

System Info

System:
    OS: macOS 12.2
    CPU: (10) arm64 Apple M1 Max
    Memory: 281.78 MB / 32.00 GB
    Shell: 5.8 - /bin/zsh
  Binaries:
    Node: 14.18.1 - ~/.nvm/versions/node/v14.18.1/bin/node
    Yarn: 1.22.17 - ~/.nvm/versions/node/v14.18.1/bin/yarn
    npm: 8.3.0 - ~/.nvm/versions/node/v14.18.1/bin/npm
  Browsers:
    Chrome: 99.0.4844.74
    Firefox: 97.0.1
    Safari: 15.3
  npmPackages:
    @vitejs/plugin-react: ^1.0.7 => 1.2.0 
    vite: ^2.8.0 => 2.8.6

Used Package Manager

npm

Logs

No response

Validations

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• 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.
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• The provided reproduction is a minimal reproducible example of the bug.

[gwhobbs]

See workaround in #6907

[sapphi-red]

#7132 fixes this issue and I confirmed that vite v2.9.1 (which includes that PR) is working well.