Folders and files in .apt_generated not automatically created using the plugin id "net.ltgt.apt" version "0.11 (JHipster/Mapstruct)"

Question

I created a new JHipster project (with version 4.8.1) and I imported it as Gradle project into Spring Tool Suite 3.9.0.RELEASE

When I run the project, I have this message in the console:

> Consider defining a bean of type
> 'it.andrea.test.service.mapper.PersonaMapper' in your configuration.

I see that the folder .apt_generated is never created.

In the build.gradle file, I changed the plugin

id "net.ltgt.apt" version "0.11"

with

id "net.ltgt.apt" version "0.8"

and now it works.

Why? Regards, Andrea