Change caused by editing a person is not captured by the group that person belongs to

[Taoseeker]

Edited the person name from Lekang to Ben.

The person's name is properly changed in the preview of the group.

But after input show-group-details commands, the person name is not changed.

For debugging, I noted that when I update the details of a group using edit-group INDEX n/NAME (I did not include a tag), the show-group-details content will update accordingly.