@vanilla-extract/vite-plugin loads css files multiple times in Storybook when using theme

[SamBernaerdtOntoforce]

Describe the bug

Minimal Problem:
When using themes, vite loads a new (filename).css.ts.vanilla.css?t=1728553686586 file for every other file that uses itin the development build of storybook.

Expected:
Each .css.ts file should only be loaded once (until it changes and causes a hot reload)

Problem:
This might not be an issue on the small reproducible project, but on a larger project, where multiple theme files are composited, each of the theme files is loaded for each component using a theme value. This causes so many file loads that it freezes storybook.

Reproduction

https://github.com/SamBernaerdtOntoforce/vanilla-extract-theme-and-storybook

System Info

System:
    OS: macOS 14.7
    CPU: (12) arm64 Apple M2 Pro
    Memory: 279.81 MB / 32.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 21.7.3 - ~/.nvm/versions/node/v21.7.3/bin/node
    Yarn: 1.22.19 - ~/.nvm/versions/node/v21.7.3/bin/yarn
    npm: 10.5.0 - ~/.nvm/versions/node/v21.7.3/bin/npm
    pnpm: 8.8.0 - ~/.nvm/versions/node/v21.7.3/bin/pnpm
  Browsers:
    Chrome: 129.0.6668.100
    Edge: 129.0.2792.79
    Safari: 18.0
  npmPackages:
    @vanilla-extract/css: ^1.16.0 => 1.16.0
    @vanilla-extract/vite-plugin: ^4.0.16 => 4.0.16
    vite: ^5.4.8 => 5.4.8

Used Package Manager

yarn

Logs

No response

Validations

• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• The provided reproduction is a minimal reproducible example of the bug.