The "exclude file" cannot be used to exclude tables using the MyISAM engine in the backup database of the mariabackup tool

During my use, I found a bug in MariaDB. This bug only appeared in the window environment, and there was no problem in Linux.

*The bug info: *

In the windows environment, the "tables-exclude" cannot be used to exclude tables using the MyISAM engine in the backup database of the mariabackup tool:

 bin\mariabackup --backup --target-dir=D:\90-Temp\maria --databases=mysql --tables=user --user= --password= --port=

1. Table for InnoDB engine: it will keep the ".frm" table structure file
2. Table for MyISAM engine: Not effective for "--tables-exclude", these tables still exist.

The question is also from https://stackoverflow.com/questions/63571328/the-exclude-file-cannot-be-used-to-exclude-tables-using-the-myisam-engine-in-t. Thank the friend.