"exclude_lines" not working with docker input

Elastic Stack Beats
,
8 
2019-11-20T10:17:06.049Z	DEBUG	[acker]	beater/acker.go:64	stateful ack	{"count": 20}
2019-11-20T10:17:06.052Z	DEBUG	[publish]	pipeline/processor.go:308	Publish event: {
  "@timestamp": "2019-11-20T10:17:05.456Z",
  "@metadata": {
    "beat": "filebeat",
    "type": "doc",
    "version": "6.5.4"
  },
  "prospector": {
    "type": "docker"
  },
  "beat": {
    "name": "besmtp1",
    "hostname": "besmtp1",
    "version": "6.5.4"
  },
  "host": {
    "name": "besmtp1"
  },
  "input": {
    "type": "docker"
  },
  "offset": 4278353002,
  "stream": "stderr",
  "message": "12270   no host name found for IP address 10.2.8.114",
  "tags": [
    "Filebeat-smtp"
  ],
  "docker": {
    "container": {
      "name": "smtp-cluster_smtp_1",
      "image": "namshi/smtp:latest",
      "labels": {
        "com": {
          "docker": {
            "compose": {
              "oneoff": "False",
              "project": "smtp-cluster",
              "service": "smtp",
              "version": "1.24.0",
              "config-hash": "1fdbecb642a6add2409edb105bb3877103205ca57ea43e82a672ffb6c46a8ee0",
              "container-number": "1"
            }
          }
        }
      },
      "id": "fd5616f6c389df136cb1a5c623682fc1b8992ee2698fb7c28bb2dcad8345ced2"
    }
  },
  "source": "/var/lib/docker/containers/fd5616f6c389df136cb1a5c623682fc1b8992ee2698fb7c28bb2dcad8345ced2/fd5616f6c389df136cb1a5c623682fc1b8992ee2698fb7c28bb2dcad8345ced2-json.log"
}