This was tested with the latest main from Elastic-Agent and Beats
The default logger (user configurable) and the events logger are using different formats for the timestamp:
Default logger (RFC3339):
"@timestamp":"2024-11-06T21:01:18.537Z"
Event logger (ISO8601):
"@timestamp":"2024-11-06T16:01:03.105-0500"
There is a chance this has been like that since the events logger was introduced by #4549.
Standalone Beats might be affected by this as well.