CSS live reload/hot reload not working correctly with Ember Engines

I’m experimenting with Ember Engines. It’s really cool, but it messes up CSS live reloads. Normally when I make changes to the CSS, the styles are updated in the browser without having to reload the page. But when I install the Ember Engine addon and run ember s, any saved changes to the CSS will cause a full page reload. Anybody know why engines is interfering with the live reload?

If anybody is wondering, this issue may be resolved in the next ember-engines release. Current version where the issue persists is 0.5.14.