ember-paper bug: button inside of leaflet opup

controllers.application.js

import Ember from 'ember';

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

controllers.index.js

import Ember from 'ember';

export default Ember.Controller.extend({
   location: [48.133333, 11.566667],
   slider: 50,
   switch: 1,
   actions: {
        handler(){
           debugger;
        }
    }
});

ember-cli-build.js

//ember-cli-build.js
var app = new EmberApp(defaults, {
  // Add options here
  fingerprint: {
    exclude: [
      'images/layers-2x.png',
      'images/layers.png',
      'images/marker-icon-2x.png',
      'images/marker-icon.png',
      'images/marker-shadow.png'
    ]
  }
});

styles.app.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}

.leaflet-container {
  width: 100%;
  min-height: 300px;
}

templates.application.hbs

{{outlet}}

templates.index.hbs

{{#leaflet-map lat=48.133333 lng=11.566667 zoom=12 as |layers|}}
  {{layers.tile url="http://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}.png"}}
  {{#layers.marker location=location as |marker|}}
    {{#marker.popup}}
        <p>name</p>
        {{#paper-button onClick="handler"}}paper{{/paper-button}}
        <button {{action "handler"}}>nonpaper</button>
        {{#paper-switch value=switch onChange=(action (mut switch))}} switch {{/paper-switch}}
        <input type="range" min="0" max="5" /> 
        {{paper-slider class="flex" min=0 max=100 value=slider onChange=(action (mut slider))}}
    {{/marker.popup}}
  {{/layers.marker}}
    
{{/leaflet-map}}

twiddle.json

{
  "version": "0.11.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.11.0",
    "ember-data": "2.11.0",
    "ember-template-compiler": "2.11.0",
    "ember-testing": "2.11.0",
    "ember-cli-sass": "6.1.1"
  },
  "addons": {
  	"ember-leaflet": "3.0.11",
    "ember-paper": "1.0.0-alpha.19"
  }
}