coverage broken in browser mode in a rush/pnpm monorepo

Describe the bug

When running with coverage

TypeError: Failed to fetch dynamically imported module: http://localhost:63315/@id/@vitest/coverage-v8/browser?import

It fails to import the module, most likely because in this setup modules are symlinked (i think)

Reproduction

https://github.com/Georgegriff/vitest-rush-coverage-repro

Clone repo

npm install -g @microsoft/rush

rush update

cd apps/vitest-react-app

rush test:run --coverage

Coverage fails to generate

If i delete the node modules, and in apps/vitest-rect-app run npm install instead and run

npm run test:run -- --coverage it works, further suggesting this is a bug resolving symlinks somewhere in vitest with coverage providers

System Info

System:
    OS: macOS 15.7.1
    CPU: (10) arm64 Apple M1 Max
    Memory: 122.81 MB / 32.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 20.17.0 - ~/.nvm/versions/node/v20.17.0/bin/node
    npm: 11.5.1 - ~/.nvm/versions/node/v20.17.0/bin/npm
    pnpm: 10.17.1 - ~/.nvm/versions/node/v20.17.0/bin/pnpm
    bun: 1.0.12 - ~/.bun/bin/bun
    Deno: 1.34.3 - /opt/homebrew/bin/deno
  Browsers:
    Edge: 140.0.3485.94
    Safari: 26.0.1
  npmPackages:
    @vitejs/plugin-react-swc: ^3.11.0 => 3.11.0 
    @vitest/browser: ^3.2.4 => 3.2.4 
    @vitest/coverage-v8: ^3.2.4 => 3.2.4 
    playwright: ^1.55.1 => 1.55.1 
    vite: ^6.0.0 => 6.3.6 
    vitest: ^3.2.4 => 3.2.4 
    vitest-browser-react: ^1.0.1 => 1.0.1

Used Package Manager

pnpm

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.
• 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.

Start with the linked Georgegriff/vitest-rush-coverage-repro repository and run the documented Rush coverage command in apps/vitest-react-app, then compare it with the working npm installation path. Trace browser coverage's dynamic import of @vitest/coverage-v8/browser under the symlinked monorepo setup; done means coverage generates successfully with Rush and pnpm.