[BUG] After a group member is banned, the system automatically lifts the ban but it does not take effect

### OpenIM Server Version

3.8.3

### Operating System and CPU Architecture

Linux (AMD)

### Deployment Method

Source Code Deployment

### Bug Description and Steps to Reproduce

1.Group members have been banned from speaking
2.On the oepnIM ADMIN platform, the list of group members shows that banned group members are listed as banned

### Screenshots Link

_No response_