The mariabackup native backup keep missing 'xtrabackup_checkpoints'

Executing below two commands (full and partial)

"C:\xxxxxxx\mariabackup" --parallel=3 --backup --user=aaaaaa --password=cccccc --log-copy-interval=100 --ftwrl-wait-query-type=UPDATE --lock-ddl-per-table --target-dir=some_path

or

"C:\xxxxxxx\mariabackup" --parallel=3 --backup --user=aaaaaa --password=cccccc --log-copy-interval=100 --ftwrl-wait-query-type=UPDATE --lock-ddl-per-table --target-dir=some_path2 --incremental-basedir=some_path

It missing(not copying/creating) 'xtrabackup_checkpoints' and 'xtrabackup_info' time to time.
donno why. It occurs about... 1 out of 15~20 from any of each above. It is very old issue.

Any work around or something?