use_aws_timestamp this parameter doesn't effect

[PawXQ]

Problem

Hi Everyone when I try to get log from cloudwatch and send to kafka, I also want to get the clodwatcg timestamp, so I use use_aws_teimstamp = true but it seems doesn't work

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Steps to replicate

Provide example config and message

Expected Behavior or What you need to ask

I want to get the cloudwatch timestamp as below, and show it in the kafka

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Using Fluentd and CloudWatchLogs plugin versions

• OS version Ubuntu 22.04 jammy
• Bare Metal
• Fluentd v1.16.3
• Dependent gem versions
  *fluent-plugin-cloudwatch-logs (0.14.3)
  *fluent-plugin-kafka (0.19.2)