[PVE-User] Backup broken?

[Bernhard Dick]

Hi,

I've a weekly backup job on my proxmox (community version 6.2) 
infrastructure. Yesterday I've updated to the latest package versions 
available and in the night the backup job ran. But he decided to first 
create a backup and then delete _all_ backups being on the backup 
location which is now empty besides some log files.
Here is an excerpt of one of the mailed logs:

101: 2020-10-31 02:04:31 INFO: creating vzdump archive 
'/mnt/pve/backup-fsn0/dump/vzdump-lxc-101-2020_10_31-02_04_30.tar.lzo'
101: 2020-10-31 02:05:15 INFO: Total bytes written: 838041600 (800MiB, 
19MiB/s)
101: 2020-10-31 02:05:16 INFO: archive file size: 383MB
101: 2020-10-31 02:05:16 INFO: removing backup 
'backup-fsn0:backup/vzdump-lxc-101-2020_10_14-00_57_00.tar.zst'
101: 2020-10-31 02:05:16 INFO: removing backup 
'backup-fsn0:backup/vzdump-lxc-101-2020_10_16-19_20_41.tar.lzo'
101: 2020-10-31 02:05:16 INFO: removing backup 
'backup-fsn0:backup/vzdump-lxc-101-2020_10_17-02_10_31.tar.lzo'
101: 2020-10-31 02:05:17 INFO: removing backup 
'backup-fsn0:backup/vzdump-lxc-101-2020_10_24-02_03_29.tar.lzo'
101: 2020-10-31 02:05:25 INFO: removing backup 
'backup-fsn0:backup/vzdump-lxc-101-2020_10_31-02_04_30.tar.lzo'
101: 2020-10-31 02:05:25 INFO: remove vzdump snapshot
101: 2020-10-31 02:05:26 INFO: Finished Backup of VM 101 (00:00:56)

Is it possible that I've triggert a very evil bug here?

   Best regards
     Bernhard