Ember-cli babel picking up handlebars templates

Just went to Ember cli 2.3 from 1.13 and everything seemed to go smoothly, however on the first run of ember s I get

[BABEL] Note: The code generator has deoptimised the styling of "platform/templates/partials/someform.js" as it exceeds the max of "100KB".

when the file in question is actually .hbs is there a setting I need to pass to babel?

Resolved Babel trying to parse handlebars file · Issue #5492 · ember-cli/ember-cli · GitHub