progress bar does NOT print when building inside a docker container

[MakersAll8]

I have struggled to get progress bar to print from inside a development docker container.

My docker-compose.yml has tty: true turned on for my app
My app is bootstrapped with create-react-app using customize-cra

const addPlugins = config => {
  config.plugins.push(
    new ProgressBarPlugin({
      format: '  build [:bar] ' + chalk.green.bold(':percent') + ' (:elapsed seconds)',
      clear: false
    })
  );
}

Progress bar prints fine if I run npm start on a bare mental host, however when I attempt to run docker-compose up, the progress bar does NOT print at all. The app builds and starts fine, it's just the progress bar that's missing.

Could anyone give me a pointer to what I can do to get the progress bar show up inside my container? I've run out of moves.

I've checked that enabled evaluates to true