备份配置自动清理策略但过期备份未正常清理

obclient [oceanbase]> show parameters like '%backup_dest_option';
recovery_window=7d&auto_delete_obsolete_backup=true&backup_copies=2&log_archive_piece_switch_interval=1d

obclient [oceanbase]> show parameters like 'auto_delete_expired_backup';

+-------+----------+---------------+----------+----------------------------+-----------+-------+---------------------------------------+----------+---------+---------+-------------------+
| zone  | svr_type | svr_ip        | svr_port | name                       | data_type | value | info                                  | section  | scope   | source  | edit_level        |
+-------+----------+---------------+----------+----------------------------+-----------+-------+---------------------------------------+----------+---------+---------+-------------------+
| zone3 | observer | xx.xx.xx.xx   |     2882 | auto_delete_expired_backup | NULL      | True  | control if auto delete expired backup | OBSERVER | CLUSTER | DEFAULT | DYNAMIC_EFFECTIVE |

obclient [oceanbase]> show parameters like 'backup_recovery_window';

+-------+----------+---------------+----------+------------------------+-----------+-------+-----------------------------------------------------------------------------------------------+----------+---------+---------+-------------------+
| zone  | svr_type | svr_ip        | svr_port | name                   | data_type | value | info                                                                                          | section  | scope   | source  | edit_level        |
+-------+----------+---------------+----------+------------------------+-----------+-------+-----------------------------------------------------------------------------------------------+----------+---------+---------+-------------------+
| zone3 | observer | xx.xx.xx.xx   |     2882 | backup_recovery_window | NULL      | 7d    | backup expired day limit, 0 means not expiredRange: [0, max) in time interval, for example 7d | OBSERVER | CLUSTER | DEFAULT | DYNAMIC_EFFECTIVE |