TraceListener not work

Version: 4.1.2
configure:

spring:
  cloud:
    bus:
      enabled: true
      id: MSGSMS:OMP:AMService:${VM_IP:${random.uuid}}
      trace:
        enabled: true
      ack:
        enabled: true

HttpExchangeRepository：

@Component
public class LogEventTraceRepository implements HttpExchangeRepository {
    private static final Logger log = LoggerFactory.getLogger(LogEventTraceRepository.class);

    private List<HttpExchange> traces = new ArrayList<>();


    @Override
    public List<HttpExchange> findAll() {
        return new ArrayList<>(traces);
    }

    @Override
    public void add(HttpExchange httpExchange) {
        traces.add(httpExchange);
        log.info("traces is {}", httpExchange);
    }

}

but when i define a AckRemoteApplicationEvent listener,it works well：

@Component
public class AckListener {

    @EventListener
    public void onApplicationEvent(AckRemoteApplicationEvent event) {
        System.out.println("get ack event " + event.getOriginService());
    }
}

how can i make trace listener works well

Start by examining the Spring Cloud Bus 4.1.2 trace configuration and how HttpExchangeRepository beans are registered, then compare that path with the working AckRemoteApplicationEvent listener. Reproduce the configuration and verify that LogEventTraceRepository.add receives HTTP exchanges and that findAll returns them.