clone results original .ibd file disappeared

[MIN SOO CHO]

I did following.
1. on master node, initialize database, install clone.so plugin, create clone user, and execute dba.createCluster() and make testdb and test table.
2. on primary node, initialize database and install clone.so and group_replication.so plugin and tried "clone instance from clone_user@mysqlgr1:3306 identified by password"

the "clone instance" statement failed with message "ERROR 3862 (HY000): Clone Donor Error: 1016 : Can't open file: './testdb/hello.ibd' (errno: 2 - No such file or directory)."

When I looked into /var/lib/mysql, the testdb directory and hello.ibd disappeared.

When I did not do dba.createCluster() and execute "clone instance" the testdb database directory and hello.ibd was kept.

Did I do something wrong?