I created a simple Ember.js app with a template that uses an ember-radio-button and noticed that the field in the DOM is missing the "value" attribute. Example can be found here:
https://lepolt.github.io/radio-button-test/
The attached screenshot demonstrates the output as well.

We are using Ember 2.11. This only affects IE, at least version 11. Appears to be related to the following Ember.js issue: emberjs/ember.js#14712