Reload will cause some parallel mechanism broken on Windows

[BHznJNs]

When running uvicorn with the --reload flag inside a parallel job runner like concurrently on Windows, the entire parallel session terminates whenever a reload is triggered. I tried both the uvicorn command (uvicorn src.main:app --reload) and programatically way (import uvicorn; uvicorn.run("src.main:app", reload=True))

My environment:

• uvicorn: 0.40.0
• python: 3.14.2

The parallel job runner I tried:

• concurrently https://www.npmjs.com/package/concurrently
• npm-run-all www.npmjs.com/package/npm-run-all
• pnpm (with --parallel)
• task https://taskfile.dev/docs/reference/cli#p-parallel

I also tried watchdog with such a command without changing my codes:

uv run watchmedo auto-restart --patterns="*.py;*.html;*.css" --recursive -- uv run python entry.py

It works (excepts I need to manually kill the previous process after reloading).