.html() works unexpectedly for redirects when rendering fastboot on a cdn using fastboot.visit()

[hoIIer]

I'm rendering a fastboot page on a cdn like so:

          const res = await this.fastboot.visit(
            this.request.url,
            {request: this.request},
          );
          
          html = await res.html();
          ...

I have a route with nested child routes, and I want the index to redirect to the child like so:

  this.route('foo', function() {
    this.route('bar');
  });

import Route from '@ember/routing/route';

export default class FooIndexRoute extends Route {
  redirect() {
    this.transitionTo('foo.bar');
  }
}

When a user navigates directly to mysite.com/foo, fastboot hits this line and instead of rendering the redirected page, it returns an anchor link which exposes the cdn resource.

<h1>Redirecting to <a href="${location}">${location}</a></h1>

I was able to get around this using a small hack but wondering if we should include an optional param to html() that would tell fastboot to render the redirected page?

          const res = await this.fastboot.visit(
            this.request.url,
            {request: this.request},
          );

          if (res.statusCode >= 300 && res.statusCode <= 399) {
            // trick fastboot into thinking it was a successful request.
            res._fastbootInfo.response.statusCode = 200;
          }

          // render the pages html.
          html = await res.html();