--next build error: Components with "assetDir" or "assetDirs" set do not copy the folder to the www directory

[splitinfinities]

Stencil version:

 @stencil/core@1.9.0-10

I'm submitting a:

[x] bug report
[ ] feature request
[ ] support request => Please do not submit support requests here, use one of these channels: https://stencil-worldwide.herokuapp.com/ or https://forum.ionicframework.com/

Current behavior:
Folders set on a component in the "assetsDirs" and "assetsDir" aren't copied to the /www/build directory.

On a production build - not a watch process - they are copied to the dist/{namespace}/ directory - so that's good.

You can visit this repo to reproduce: https://github.com/splitinfinities/Stellar/tree/beta

Expected behavior:
Should be copying the themes/ directory into the www/build/ directory on initial build.

Steps to reproduce:
I have a google maps component that has a theme attribute. That theme attribute typically loads a json file that styles the google map.

I define the google maps component as shown below, then run npm start - however the www directories look like:

where running npm run build.prod produces the expected result:
Actually, this happens with production builds as well.

Related code:

@Component({
  tag: 'stellar-google-maps',
  styleUrl: 'map.css',
  assetsDirs: ["themes"]
 // assetDir: "themes" also behaves the same way
})
export class Map {

  // other stuff...

  @Prop() theme: string = "default";

  @Watch('theme')
  async handleTheme() {
    let styles = [];

    if (this.theme) {
      styles = await (await fetch(getAssetPath(`./themes/${this.theme}.json`))).json();
    }

    this.map.setOptions({ styles })
  }

  // other stuff...

  render () {
    return <div id="map" />
  }
}

Other information:

[splitinfinities]

Edited all this copy because wowza do I need to proofread before I publish more often lol.

[splitinfinities]

I take that back - it also happens in the dist directory. I hadn't added the --next flag to the build script.