Ember Bootstrap: Open another modal from within an modal

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  showFirstModal: true,
  showSecondModal: false,
  
  actions: {
    switchModals() {
      this.setProperties({
        showFirstModal: !this.showFirstModal,
        showSecondModal: !this.showSecondModal,
      });
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{#bs-modal
  open=showFirstModal
}}
  first modal
  <button onclick={{action "switchModals"}}>Show other modal</button>
{{/bs-modal}}

{{#bs-modal
  open=showSecondModal
}}
	second modal
  <button onclick={{action "switchModals"}}>Show other modal</button>
{{/bs-modal}}

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "ember-bootstrap": "2.3.0"
  }
}