Why does the internal machine memory of MySQL 8.4.1 LTS Innodb cluster keep growing?

[Fu Xiangyu]

The problem occurs in MySQL 8.4.1 LTS (built in Docker based on ubuntu22.04). Innodb cluster (single master mode, three nodes) is deployed through MySQL shell 8.4.1 LTS. After I set it up, I found that the memory of the cluster machine was growing. I used the following command to check:
select USER,HOST,EVENT_NAME,COUNT_ALLOC,COUNT_FREE,CURRENT_COUNT_USED,SUM_NUMBER_OF_BYTES_ALLOC,SUM_NUMBER_OF_BYTES_FREE,CURRENT_NUMBER_OF_BYTES_USED from performance_schema.memory_summary_by_account_by_event_name order by CURRENT_NUMBER_OF_BYTES_USED desc limit 10;
It is found that memory/group_rpl/Gcs_message_data:: m_buffer keeps growing and no memory is released. I tried to replace the jemalloc memory allocator, but it didn't work.And I checked the process and found no abnormal blocking.
This innodb cluster is directly built by mysqlshell 8.4.1 LTS.