geoJSON layer disappears on update

controllers.application.js

export default Ember.Controller.extend({
  
  lat: -27.5555,
  lng: 152.94703,
  zoom: 7,
  
  test1:[-27.5555, 152.94703],
  test2:[-27.69149, 153.01561],

});

styles.app.css

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

.leaflet-container {
    width: 100%;
    height: 300px;
    font-family: inherit;
}

templates.application.hbs

<h2>Click the button below to trigger the GeoJson prop to get updated</h2>

<p>Notice that even though it is the same valid GeoJSON, it doesn't display</p>

{{#leaflet-map lat=lat lng=lng zoom=zoom}}
    {{tile-layer url="http://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}.png"}}
    
    {{#marker-layer location=test1}}
		{{#tooltip-layer permanent=true}}
			hello
		{{/tooltip-layer}}
	{{/marker-layer}}
	
	{{#marker-layer location=test2}}
		{{#tooltip-layer permanent=true}}
			hello
		{{/tooltip-layer}}
	{{/marker-layer}}
{{/leaflet-map}}

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",
    "ember-leaflet": "3.0.10"
  }
}