beforeEach/beforeAll in setup file gets executed only for one test suite #11073

Describe the bug

When:

• beforeEach/beforeAll is present in a setup file
• the setup file is referenced in setupFiles without extension
• the configuration contains isolate: false and maxWorkers: 1 (which I'm using to speed up the tests)

then the callback runs only for one test file (apparently one that happens to be executed first) instead of for all files.

In the repro, observe the console output: beforeEach is printed only once instead of 2 times.

Reproduction

https://stackblitz.com/edit/vitest-dev-vitest-bw2va5tg?file=vite.config.js

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: 22.22.3 - /usr/local/bin/node
    Yarn: 1.22.19 - /usr/local/bin/yarn
    npm: 10.8.2 - /usr/local/bin/npm
    pnpm: 8.15.6 - /usr/local/bin/pnpm
  npmPackages:
    vitest: 4.1.11 => 4.1.11

Used Package Manager

npm

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