I was refactoring a simple project today that had a partial. When I got it updated from globals to modules using ES6 I ran into an issue where ember could not find a partial (and this worked before the upgrade).
The partial file was named _foo.handlebars and placed in the root templates folder (no nesting like when the app was globals)
It was available in the final deps.min.js that was compiled down via Grunt (again -same process as the globals version). In the parent template it was referenced like so
{{partial "foo"}}
Does using EAK require you name/organize partials in a special way that I'm unaware of?