No view support apparently generated for adding an entity to a 'hasMany' association

[KymPohl]

With a simple Book / Author example it seems that the scaffolded 'create new author' view is not rendering a provision for adding a 'book' (created on the spot, or already existing in the system) to the 'hasMany books' association. I'm using Grails 3.1.2 with scaffolding plugin 3.2.1 . Here is my use case:

// Model
class Book {
String title
}

class Author {
String name
static hasMany = [books: Book]
}

// Controllers
class BookController {
static scaffold = Book
}

class AuthorController {
static scaffold = Author
}

I certainly might be missing something but with such a straightforward example I'm wondering if this might be a bug with either the scaffolding plugin, grails, or the interaction between the two...