Multiple processes exiting with code 0 or SIGTERM produce a non-zero exit code

4.1.0

This is my output. All the processes are exiting with 0 or SIGTERM. But the final exit code is non-zero.

[test  ] npm run test:docker:sleep exited with code 0
--> Sending SIGTERM to other processes..
[server] [mock   ] npm run start:mockserver:nobunyan exited with code SIGTERM
[server] [nes    ] DOCKER=1 nessie start exited with code 0
[server] [webpack] npm run webpack:server exited with code 0
[server] npm ERR! code ELIFECYCLE

Here are my npm scripts:

  "start:docker": "concurrently --n  'nes    ,mock   ,webpack' -s 'first' 'DOCKER=1 nessie start' 'npm run start:mockserver:nobunyan' 'npm run webpack:server'",

  "test:docker:sleep":  "sleep 10 && npm run --prefix functional-tests test:docker",
  "test:functional:docker:ra": "npm-run-all --parallel -lr 'test:docker:sleep' 'start:docker'",
  "test:functional:docker": "concurrently -n 'test  ,server' -s 'first' --kill-others 'npm run test:docker:sleep' 'npm run start:docker' ",

test:functional:docker:ra runs the same commands but exits with 0 (the desired output).

I need this exit code for my build pipeline.

Reproduce the reported concurrently 4.1.0 behavior using the shown npm scripts, especially the test:functional:docker:ra and test:functional:docker commands. Start at concurrently's process-exit and final exit-code handling; done means the command returns zero when every process exits with code 0 or SIGTERM.