Ejabberd：用户可以看到其他（外国）聊天内容

A 已经在我的 Archlinux 机器上测试了 ejabberd 20.03 几个星期，作为家庭中可能的 WhatsApp 替代品。我为我的用户数据库使用 postgresql 后端。直到今天一切顺利：我为姐姐创建了第三个帐户。登录没问题，我们可以互相聊天。问题来了：她可以看到我和这里儿子的聊天记录，这是/是第一个非管理员用户！他的聊天记录是明文，而我的不可读。

我没有创建一个聊天室，几乎所有的东西（除了用户认证的东西）都是默认的。我们都在 Android 上使用当前的对话。我不知道这里发生了什么...

模块部分：

modules:
  mod_adhoc: {}
  mod_admin_extra: {}
  mod_announce:
    access: announce
  mod_avatar: {}
  mod_blocking: {}
  mod_bosh: {}
  mod_caps: {}
  mod_carboncopy: {}
  mod_client_state: {}
  mod_configure: {}
  mod_disco: {}
  mod_fail2ban: {}
  mod_http_api: {}
  mod_http_upload:
    put_url: https://@HOST@:5443/upload
  mod_last: {}
  mod_mam:
    ## Mnesia is limited to 2GB, better to use an SQL backend
    ## For small servers SQLite is a good fit and is very easy
    ## to configure. Uncomment this when you have SQL configured:
    db_type: sql
    assume_mam_usage: true
    default: always
  mod_mqtt: {}
  mod_muc:
    access:
      - allow
    access_admin:
      - allow: admin
    access_create: muc_create
    access_persistent: muc_create
    access_mam:
      - allow
    default_room_options:
      mam: true
  mod_muc_admin: {}
  mod_offline:
    access_max_user_messages: max_user_offline_messages
  mod_ping: {}
  mod_privacy: {}
  mod_private: {}
  mod_proxy65:
    access: local
    max_connections: 5
  mod_pubsub:
    access_createnode: pubsub_createnode
    plugins:
      - flat
      - pep
    force_node_config:
      ## Avoid buggy clients to make their bookmarks public
      storage:bookmarks:
        access_model: whitelist
  mod_push: {}
  mod_push_keepalive: {}
  mod_register:
    ## Only accept registration requests from the "trusted"
    ## network (see access_rules section above).
    ## Think twice before enabling registration from any
    ## address. See the Jabber SPAM Manifesto for details:
    ## https://github.com/ge0rg/jabber-spam-fighting-manifesto
    ip_access: trusted_network
  mod_roster:
    versioning: true
#  mod_s2s_dialback: {}
  mod_shared_roster: {}
  mod_stream_mgmt:
    resend_on_timeout: if_offline
  mod_vcard: {}
  mod_vcard_xupdate: {}
  mod_version:
    show_os: false