There was an error getting log events. Rate exceeded

When I click log group, there is a high probability that an error will be reported: There was an error getting log events. Rate exceeded. When I view the service quota in my account region: （Service Quotas > AWS service > Amazon CloudWatch Logs > GetLogEvents throttle limit in transactions per second ） I see that the quota limit is not exceeded。

Normally, if such an error occurs when I click on the page, I will try again, which is not a big problem. However, when I use fluentd to collect logs from a log group, fluentd always reports an error "ThrottlingException get_log_events. Waiting 60.0 seconds to retry."

Therefore, I would like to know why such an error is reported without exceeding the service quota.

Thank you for any help！