ED belongsTo Bug

adapters.user.js

import DS from 'ember-data'

export default DS.Adapter.extend({

  queryRecord() {
    try { 
      let uP = this.store.createRecord('user-permissions', { id: 123, name: 'users permissions' })
      console.log(uP)
      
      return this.store.createRecord('user', { id: 123, name: 'a user', userPermissions: uP })
      
    } catch (error) {
      console.log(error)
    }
  }
  
})

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

models.user-permissions.js

import Model from 'ember-data/model';
import attr from 'ember-data/attr';
import { belongsTo, hasMany } from 'ember-data/relationships';

export default Model.extend({
  name: attr(),
  user: belongsTo('user')
});

models.user.js

import Model from 'ember-data/model';
import attr from 'ember-data/attr';
import { belongsTo, hasMany } from 'ember-data/relationships';

export default Model.extend({
  name: attr(),
  userPermissions: belongsTo('user-permissions')
});

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  async model() {
    const res = this.store.queryRecord('user', { me: true })
		console.log(res)
    return res
  }
});

templates.application.hbs

<ul>
  <li><strong>user:</strong> {{model}}</li>
  <li><strong>user.userPermissions:</strong> {{model.userPermissions}}</li>
</ul>

twiddle.json

{
  "version": "0.15.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.2.2",
    "ember-template-compiler": "3.2.2",
    "ember-testing": "3.2.2"
  },
  "addons": {
    "ember-data": "3.2.0"
  }
}