Logstash grok regex bug?

[elasticnubie]

Logstash grok regex match result is not same with Kibana Grok Debugger.
(I think Kibana Grok Debugger's result is correct.)

Is there my fault? or is it grok's bug?

Filebeat Config

filebeat.inputs:
- type: log
  paths:
    - C:/filebeat/smtp.log
  multiline.pattern: 'SMTP Server: Originator'
  multiline.negate: true
  multiline.match: after
  multiline.flush_pattern: 'SMTP Server: Message'

Logstash Config

filter {
    grok {
        match => {
            "message" => "\[.*\] (?<timestamp>\d{4}-\d{2}-\d{2} (?:AM|PM) \d{2}:\d{2}:\d{2})  SMTP Server: Originator: (?<sender>.*?)\n(?<temp_receiver>(?:.*SMTP Server: Recipient: .*\n)+)(?:.*\n)*(?:.*SMTP Server: Message.*size (?<size>.*))"
        }
    }
}

Logstash Debug Output

Kibana Grok Debugger Result

How can I get a same result with kibana grok debugger in logstash grok?
plz, help me~

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