readyWhen option of run-commands executor silently ending tasks

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Current Behavior

I have some core tasks that need to be run before running specs. I am using the dependsOn and readyWhen options with the aim of:

1. running 2 backend tasks in parallel (serverless and mock api)
2. running 2 front end tasks in parallel (FE packages)

Here's the config:

{
    "name": "e2e",
    "$schema": "../../../node_modules/nx/schemas/project-schema.json",
    "targets": {
        "dev": {
            "executor": "@nx/playwright:playwright",
            "options": {
                "config": "packages/specs/e2e/playwright.config.ts",
                "ui": true
            }
        },
        "lint": {
            "executor": "@nx/linter:eslint",
            "outputs": ["{options.outputFile}"],
            "options": {
                "lintFilePatterns": ["packages/specs/e2e/**/*.{js,ts}"]
            }
        },
        "local": {
            "executor": "nx:run-commands",
            "options": {
                "command": "nx run-many --parallel=2 -t serve -p dev-tools-local-api,common-serverless-application",
                "readyWhen": "Starting Offline SQS"
            }
        },
        "test": {
            "executor": "@nx/playwright:playwright",
            "outputs": ["{workspaceRoot}/dist/.playwright/packages/specs/e2e"],
            "options": {
                "config": "packages/specs/e2e/playwright.config.ts"
            }
        },
        "serve": {
            "executor": "nx:run-commands",
            "dependsOn": ["local"],
            "configurations": {
                "holiday-letting": {
                    "command": "nx run-many --parallel=2 -t serve -p holiday-letting-agent-app,holiday-letting-nsw-signing-experience"
                },
                "sales": {
                    "command": "nx run-many --parallel=2 -t serve -p sales-agent-app,sales-nsw-signing-experience"
                },
                "property-management": {
                    "command": "nx run-many --parallel=2 -t serve -p property-management-agent-app,property-management-nsw-signing-experience"
                }
            }
        }
    }
}

The nx pipeline correctly waits for the "Starting Offline SQS" string to appear, but then it seemingly just kills both the SQS and API when the serve task begins.

Expected Behavior

When I run the needed tasks in a single command like so:

{
  "holiday-letting": {
      "command": "nx run-many --nxBail --parallel=4 -t serve -p holiday-letting-agent-app,holiday-letting-nsw-signing-experience,dev-tools-local-api,common-serverless-application"
  },
}

Then it works fine and I can continue to run tests. Am I missing something obvious here? Is readyWhen designed to end a child process when it matches on the string? If so that is a bit unexpected (still learning the NX way of things, apologies if I'm out of step here).

The behaviour I'm looking for is to always run the 1st task (local which serves the backend and API) and then execute the 2nd configurable task (serve:sales or serve:holiday-letting).

Bonus Qs:

1. is it possible to get NX to run the commands in parallel but still output to different shells i.e. I see 4 terminals from within the VS Code terminal tab?
2. is it possible to get NX to share the depended upon task? What I mean is, if run serve:holiday-letting from the NX console and also run serve:sales in another terminal, will the 2nd task see that there is already a running backend and API and know not to spin up an extra one?

Thanks for your time and patience in this matter peeps, so far love the work 🚀

GitHub Repo

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Steps to Reproduce

Provided config demonstrates how to reproduce issue.

Nx Report

Node   : 20.15.1
OS     : darwin-arm64
npm    : 10.7.0

nx                 : 16.10.0
@nx/js             : 16.10.0
@nx/jest           : 16.10.0
@nx/linter         : 16.10.0
@nx/workspace      : 16.10.0
@nx/cypress        : 16.10.0
@nx/devkit         : 16.10.0
@nx/esbuild        : 16.10.0
@nx/eslint-plugin  : 16.10.0
@nx/node           : 16.10.0
@nx/playwright     : 16.10.0
@nx/react          : 16.10.0
@nx/storybook      : 16.10.0
@nrwl/tao          : 16.10.0
@nx/vite           : 16.10.0
@nx/web            : 16.10.0
typescript         : 5.1.6

Failure Logs

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Package Manager Version

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Operating System

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• Linux
• Windows
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Additional Information

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