Behat with Selenium Hub and Firefox Error: Could not open connection: Payload received from webdriver is valid but unexpected json

I'm trying to run Behat on Docker using selenium/hub, selenium/node-chrome-debug and selenium/node-firefox-debug images.

Running Behat with the Chrome node is working, but the Firefox node gives me the following error:

Could not open connection: Payload received from webdriver is valid but unexpected json: {"value":{"sessionId":"244f4715-c59b-4bfc-aa17-8f6a867ead83","capabilities":{"moz:profile":"/tmp/rust_mozprofile.u3mB4xKf6nVD","rotatable":false,"timeouts":{"implicit":0,"pageLoad":300000,"script":30000},"pageLoadStrategy":"normal","moz:headless":false,"moz:accessibilityChecks":false,"acceptInsecureCerts":false,"browserVersion":"57.0","platformVersion":"4.9.60-linuxkit-aufs","moz:processID":1005,"browserName":"firefox","platformName":"linux","moz:webdriverClick":false}}} (Behat\Mink\Exception\DriverException)

When I vnc to Firefox node, I see it opened Firefox, but nothing is happening.

My docker-compose.yml:

version: '3.2'

services:
  site.local:
    image: webdevops/php-apache-dev:7.1
    ports:
      - "8888:80"
    volumes:
      - ./public:/app
      - .:/application

  selenium-grid-hub.local:
    image: selenium/hub
    ports:
      - "4445:4444"

  selenium-node-chrome.local:
    image: selenium/node-chrome-debug
    environment:
      - HUB_PORT_4444_TCP_ADDR=selenium-grid-hub.local
      - HUB_PORT_4444_TCP_PORT=4444
    ports:
      - "5901:5900"

  selenium-node-firefox.local:
    image: selenium/node-firefox-debug
    environment:
      - HUB_PORT_4444_TCP_ADDR=selenium-grid-hub.local
      - HUB_PORT_4444_TCP_PORT=4444
    ports:
      - "5902:5900"

My behat.yml:

default:
  extensions:
    Behat\MinkExtension:
      base_url: "http://site.local"
      goutte:
        guzzle_parameters:
          verify: false
  suites:
    mysuite:
      paths:    [ %paths.base%/features ]
      contexts:
        - Zstate\BehatSeleniumDockerSkeleton\Tests\Behat\Context\FeatureContext

chrome:
  extensions:
    Behat\MinkExtension:
      selenium2:
        browser: "chrome"
        wd_host: http://selenium-grid-hub.local:4444/wd/hub
        capabilities: {"browserName": "chrome", "browser": "chrome", 'chrome': {'switches':['--no-sandbox']}}

firefox:
  extensions:
    Behat\MinkExtension:
      selenium2:
        browser: "firefox"
        wd_host: http://selenium-grid-hub.local:4444/wd/hub
        capabilities: {"browserName": "firefox", "browser": "firefox"}

I created this small repo to replicate the issue.

I would greatly appreciate any help or advice. Please let me know if I miss something in my question so I can update it.