Environment

• Operating System: Darwin
• Node Version: v22.17.0
• Nuxt Version: 4.0.3
• CLI Version: 3.27.0
• Nitro Version: 2.12.4
• Package Manager: pnpm@10.12.1
• Builder: -
• User Config: compatibilityDate, extends, fonts, css, vite, i18n, runtimeConfig, alias, imports, image
• Runtime Modules: -
• Build Modules: -

Reproduction

WIP

Describe the bug

I've noticed that compiled .js files have started appearing (seemingly at random) next to their source files in projects running on version 4.0.3 while the dev server is running.
This wasn't present in 4.0.1.

Additional context

Edit:
Not confirmed yet, but this appears to be happening after the [unhandledRejection] read ECONNRESET error.

Logs