Comment defaults are not applied during node creation

I'm not sure if this is a bug, feature or me doing something wrong. Apologies in advance if it's not the former.

I've got a content type that gets created through Rules when a new user account gets created. On the content type comment settings, comments are open by default. If I create one of these content types (either as an administrator or not) through the normal content process, the comments are open as expected. If however I create the node with Rules the comments are closed by default regardless of the default setting in Content Types. They can be opened by clicking edit and enabling them but I don't know why they're not enabling by default.

Any idea what could be causing this?