Select returning previous selection

### Version of x-select:
3.0.0
### Ember Version / Ember CLI Version:

**Ember Version: 2.12**
**Ember CLI Version: 2.12**

### Expected Behavior
Should return value of current selection

route template:

{{#x-select on-click=(action "selectSite") value=locations.id as |xs|}}
Site Filter
{{#each locations as |location|}}
{{#xs.option value=location.id}}{{location.name}}{{/xs.option}}
{{/each}}
{{/x-select}}

controller:

export default Ember.Controller.extend({
start: Ember.inject.service(),
locations: Ember.computed.oneWay('start.sites'),
actions: {
selectSite(value, component) {
alert('site selected:' + value);
}
}
}

Example options:

ID Text
--- -----
null Site Filter
1 Albany
2 Chicago
3 Cleveland
4 Topeka

### Actual Behavior

Value being passed to action is the value from the previous selection. For example, if Site Filter is shown as selected and then Chicago is selected, the id returned would be null. Then selecting Topeka would return id 2 because Chicago was the last selection. The next selection would return id of 4.

Selected location option is shown correctly in the selector but value returned is always from the previous selection. I would expect that when I transitioned to the route that I'd also trigger the alert for the 'Site Filter' option being the default selection.