#each re-render bug

I have an array of true/false/undefined values which I am rendering as a list of checkboxes.
When changing an array element to or from true, the list of checkboxes is re-rendered with the following (index+1) checkbox inheriting the change along with the changed checkbox.
Code:
```handlebars
{{#each range as |value idx|}}
{{idx}}: {{value}}

{{/each}}
```
When I use `{{#each range key="@index" as |value idx|}}` it works correctly.

Twiddle: https://ember-twiddle.com/6d63548f35f99da19cee9f58fb64db59