Filebeat container fields mix info from several containers

Elastic Stack Beats
,
1

I'm sending logs to Graylog using filebeat on linux with the following conf:

filebeat.autodiscover:
  providers:
    - type: docker
      templates:
        - condition:
            regexp:
              docker.container.name: ^.+$
          config:
            - type: container
              paths:
                - /srv/docker/containers/*/*
              exclude_lines:
                - ^\s+[\-`('.|_]
              encoding: plain
              scan_frequency: 10s
              tail_files: true
              symlinks: true
              multiline.type: pattern
              multiline.pattern: '^[0-9]{4}-[0-9]{2}-[0-9]{2}'
              multiline.negate: true
              multiline.match: after
              json.message_key: log
              json.keys_under_root: true

There are several containers running on the server running the log collector. I want to collect logs for all the containers and in fact the conf above is doing the job BUT the information of filebeat container fields is mismatching the actual information.

I get the correct filebeat_log_file_path and the correct message but the filebeat container fields does not match the container from where I get the message.

Any hint, help?