Awesome! Congrats Chris. I wasn't sure if you would want to do the Local Override (or I would have posted the code I used). For any others, here is the code that I used:

NOTE: the problem exists in web.assets._web.js 

Search that file for: carrier_type_selection

The broken code:

onChange(ev) {

  const value = JSON.parse(ev.target.value);

  this.props.record.update({ [this.props.name]: value }, { save: this.props.autosave });

}

Hope this helps any others.

Thanks for the pointer Scott! I was able to get past it as well for the moment.