APICast access logs have very low time resolution

While using the custom logging : "[{{time_iso8601}}] [{{req.headers.X-Forwarded-For}}] original_request.host:server_port remote_addr:remote_port \"request\" status body_bytes_sent (request_time) (upstream_response_time) post_action_impact service.id service.system_name" except in some cases, all times logged are even tenths of seconds, but it should be a more continuous.