Concurrency issue

controllers.application\.js

import Controller from '@ember/controller';
import { restartableTask, timeout } from 'ember-concurrency';
import { isBlank } from '@ember/utils';

export default class ApplicationController extends Controller {
  appName = 'Ember Twiddle';

  @restartableTask *updateFilter(term) {
    if (isBlank(term)) {
      //yield timeout(1);
      //yield Promise.resolve();
      console.log('Early return');
      return term;
    }

    // Pause for debounce
    yield timeout(DEBOUNCE_MS);

    return term;
  }

}

templates.application\.hbs

<h1>Welcome to {{this.appName}}</h1>
<br>
<br>
{{outlet}}
<br>
<br>
{{#if this.updateFilter.isRunning}}
  Task is currently running!
{{/if}}

<input
  type="text"
  {{on 'input' (perform this.updateFilter value='target.value')}}
/>

LastSuccessful.Value: {{this.updateFilter.lastSuccessful.value}}

twiddle\.json

{
  "version": "0.17.1",
  "EmberENV": {
    "FEATURES": {},
    "_TEMPLATE_ONLY_GLIMMER_COMPONENTS": false,
    "_APPLICATION_TEMPLATE_WRAPPER": true,
    "_JQUERY_INTEGRATION": true
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.js",
    "ember": "3.18.1",
    "ember-template-compiler": "3.18.1",
    "ember-concurrency": "^2.0.3",
    "ember-testing": "3.18.1"
  },
  "addons": {
    "@glimmer/component": "1.0.0"
  }
}