pgbackrest archive.info got deleted unexpected

Hi,
We use pgbackrest 2.34 on RHEL8.4 to backup PGv13 database to AWS S3 buckets , we found after some time successful backup , suddenly got below error:
2022-07-23 10:30:04.743 P00 INFO: archive-push:async command begin 2.38: [/pgdata/pg_wal] --archive-async --archive-push-queue-max=10240MB --compress-type=none --exec-id=813450-3a783f75 --log-level-console=off --log-level-stderr=off --pg1-path=/pgdata --process-max=2 --repo1-path=/pgbackup --repo1-s3-bucket=xxxxxxxxx --repo1-s3-endpoint=s3-fips.us-west-2.amazonaws.com --repo1-s3-key-type=auto --repo1-s3-region=us-west-2 --repo1-type=s3 --spool-path=/pgarchive/pgbackrest --stanza=xxxxxxx
2022-07-23 10:30:04.744 P00 INFO: push 1 WAL file(s) to archive: 00000001000000DB000000A4
2022-07-23 10:30:04.907 P00 ERROR: [103]: unable to find a valid repository:
repo1: [FileMissingError] unable to load info file '/pgbackup/archive/xxxxxx/archive.info' or '/pgbackup/archive/xxxxxx/archive.info.copy':
FileMissingError: unable to open missing file '/pgbackup/archive/xxxxxx/archive.info' for read
FileMissingError: unable to open missing file '/pgbackup/archive/xxxxxx/archive.info.copy' for read
HINT: archive.info cannot be opened but is required to push/get WAL segments.
HINT: is archive_command configured correctly in postgresql.conf?
HINT: has a stanza-create been performed?
HINT: use --no-archive-check to disable archive checks during backup if you have an alternate archiving scheme.

Then we login to check both archive.info and archive.info.copy got disappeared in S3 bucket , we do not have job or command to manually delete that file, and we do not recreate standza either, not sure why suddenly missed the archive.info. without the archive.info, we have to recreate pgbackrest stanza repo again, but all old backup pieces got invalid too.

Could you help figure out how that happened ? we faced this issue several times .

Thanks,

James