Spring Filter - cycle life for HttpSession with Bean Scoped session - do not persist properties into session

i have a probleme with httpSession and spring redis implementation. I have declare a filter who have one job. Catch a request param and set it into session. This attribute is use later for call an external api.

My implementation :

i use spring-boot

i use a JedisConnectionFactory for persist my session into reddis.

<dependency>
  <groupId>org.springframework.session</groupId>
  <artifactId>spring-session-data-redis</artifactId>
</dependency>
<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-data-redis</artifactId>
  <exclusions>
    <exclusion>
      <groupId>io.lettuce</groupId>
      <artifactId>lettuce-core</artifactId>
    </exclusion>
  </exclusions>
</dependency>
<dependency>
  <groupId>redis.clients</groupId>
  <artifactId>jedis</artifactId>
</dependency>

have declare use store-type redis to spring-boot

session:
    store-type: redis
    timeout: 900s

  redis:
    host: redis
    port: 6379

now my filter

@Component
@Slf4j
@Order(1)
public class MyCustomFilter implements Filter {

  @Resource
  private SessionHelper sessionHelper;

  @Override
  public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {

    HttpServletRequest request = (HttpServletRequest) servletRequest;

    // retrieve site from request attribute
    final String site = request.getParameter("site");

    // persiste site into session with a bean scoped SESSION
    sessionHelper.saveSite(site);

    filterChain.doFilter(request, response);
  }

}

my sessionHelper

@Component
@Slf4j
@Scope(value = SCOPE_SESSION, proxyMode = TARGET_CLASS)
public class SessionHelper implements Serializable {

  @Resource
  private HttpSession httpSession;

  public void saveSite(String site) {
    httpSession.setAttribute("site", site);
  }

  public String getSite(String site) {
    return (String) httpSession.getAttribute("site");
  }

}

my service who need to retrieve site from session

@Slf4j
@Component
public class MyFacade {

  @Resource
  private SessionHelper sessionHelper;

  public void myMethod() {
    log.debug(sessionHelper.getSite());
  }

}

result, my facade log always a null. So i don't understand why. My filter set this variable into session.

i have try to log sessionId for the moment when variable is set and when she is get. sessionId is different... and i don't understand why.

if someone has a clue for me...

thx