--race appears to be non-functional about npm-run-all HOT 2 OPEN

Same issue here:

I'm trying to setup storybook tests that requires a live webserver during the test process.

{
  // ...
  "scripts": {
    "test:sb": "run-p --race --print-label test:sb:*",
    "test:sb:server": "http-server storybook-static --port 6006 --silent",
    "test:sb:runner": "wait-on -t 1m tcp:6006 && test-storybook --junit"
    // ...
  }
}

On windows client running npm run test:sb works as expected.
On ci runner (gitlab-ci, docker agent, node:lts-slim) running the same command the server keep alive.

from npm-run-all.

Solved installing package procps.
I have figured out that on *nix package an additional package procps is required and can be installed with:

# debian/ubuntu based distro
$ [sudo] apt install -y procps

# alpine based distro
$ apk add -y procps

from npm-run-all.