Hal rendering Jackson2HalModule for custom type is not working

Http converter renders data as regular json instead (i.e. "links" instead of "_links"). If set jackson module to collectionjson or uber everything seems to work fine.
Configuration

@Configuration
public class ContactDirMediaTypeConfiguration implements HypermediaMappingInformation {

  @Override
  public Module getJacksonModule() {
    return new Jackson2HalModule();
  }

  @Override
  public List<MediaType> getMediaTypes() {
    return MediaType.parseMediaTypes("application/vnd.contactdir.v1+json, application/hal+json");
  }
}

configuration provider

public class ContactDirMediaTypeConfigurationProvider implements MediaTypeConfigurationProvider {

  @Override
  public Class<? extends HypermediaMappingInformation> getConfiguration() {
    return ContactDirMediaTypeConfiguration.class;
  }

  @Override
  public boolean supportsAny(Collection<MediaType> mediaTypes) {
    return true;
  }
}

controller

@RestController
@RequestMapping("/api")
public class ContactListController {
  @GetMapping(path = "/contacts",
      produces = {"application/vnd.contactdir.v1+json", "application/hal+json"})
  public ResponseEntity<ContactDto> getAllContacts() {
    ContactDto dto = new ContactDto().setName("dfsfdsfsdf");
    dto.add(linkTo(ContactListController.class).withSelfRel());
    return new ResponseEntity<>(dto, HttpStatus.OK);
  }
}

Project reproducing the problem
Is it a bug or (what is more possible) did I miss something?

Start with the linked reproducing project and its ContactDirMediaTypeConfiguration, MediaTypeConfigurationProvider, and ContactListController entry points. Reproduce the response for the custom media type, then trace how Jackson2HalModule is registered compared with the collectionjson and uber modules. Done means the custom media type renders HAL links as "_links" rather than "links".