I have created a reproducer that contains three modules: `app` - application using the `extension` module `extension` - extension in a separate module `single-module` - single module containing an application and an extension These modules use `SEContainerInitializer` to start the container. When the `Main` class from `single-module` is started, you can see all invocations are intercepted - both from the `CdiBean` (with bean defining annotation) and from the `MyService` (added through extension).   When the `Main` class from `app` module is started, only interception on `CdiBean` works, the `MyService` methods are invoked, but not intercepted.