transition.abort clearing queryParams

controllers.application.js

import Ember from 'ember';

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

controllers.dashboards.js

import Ember from 'ember';

export default Ember.Controller.extend({
  queryParams: ['filterId'],
  filterId:'0',
});

controllers.reports.js

import Ember from 'ember';

export default Ember.Controller.extend({
 queryParams: ['filterId'],
  filterId:'0',
});

router.js

import Ember from 'ember';
import config from './config/environment';

const Router = Ember.Router.extend({
  location: 'none',
  rootURL: config.rootURL
});

Router.map(function() {
  this.route('reports');
  this.route('dashboards');
});

export default Router;

routes.dashboards.js

import Ember from 'ember';

export default Ember.Route.extend({
  queryParams: { filterId: { refreshModel: true } },
});

routes.reports.js

import Ember from 'ember';
const {isEqual} = Ember;

export default Ember.Route.extend({
  queryParams: { filterId: { refreshModel: true } },
  actions:{
    willTransition(transition){      
      if(!isEqual(transition.targetName, 'reports') && !confirm("Are you sure ?")){
        transition.abort();  
        //Ember.run.next(() => this.transitionTo({ "queryParams": {"filterId":"111" }}));
        return false;
      }
      return true;
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
Related Issues:
https://github.com/emberjs/ember.js/issues/5566
https://github.com/emberjs/ember.js/issues/12169

<br>
{{#link-to 'reports' (query-params filterId='report-1') }} Reports {{/link-to}}  | 
{{#link-to 'dashboards' (query-params filterId='dashboard-3') }} Dashboards {{/link-to}}
<br>
{{outlet}}
<br>
<br>

templates.dashboards.hbs

{{filterId}}

templates.reports.hbs

{{filterId}}

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1"
  }
}