Missing Backup Folder in Client web Folder

short description

The (manual) backup is not copied to the backup folder for download.

correct behaviour

1, Manual Backup Start 2, backup download 3, The order /backup/ is missing in /client2/web8/

environment

/var/www/clients/client2/web8/# ls -l
drwxr-xr-x 2 web8 client2 4096 May 15 10:16 cgi-bin
drwxr-xr-x 2 root root    4096 May 29 00:02 log
drwx--x--- 2 web8 client2 4096 May 15 10:16 private
drwxr-xr-x 2 root root    4096 May 29 09:34 ssl
drwxrwx--- 2 web8 client2 4096 May 29 11:16 tmp
drwxr-x--x 6 web8 client2 4096 May 29 10:00 web

 ls /backup/web8/ -l
total 459776
-rw-rw---- 1 root root   1964276 May 29 11:26 manual-db_c2_ledoptix_2020-05-29_11-26.zip
-rw-rw---- 1 root root 471802001 May 29 11:26 manual-web8_2020-05-29_11-26.zip

nginx version: nginx/1.14.2

PHP 7.3.18-1+0~20200514.58+debian10~1.gbp12fa4f

log entries

29.05.2020-11:33 - DEBUG - Remove Lock: /usr/local/ispconfig/server/temp/.ispconfig_lock
29.05.2020-11:34 - DEBUG - Calling function 'check_phpini_changes' from plugin 'webserver_plugin' raised by action 'server_plugins_loaded'.
29.05.2020-11:34 - DEBUG - Calling function 'backup_action' from plugin 'backup_plugin' raised by action 'backup_download'.
29.05.2020-11:34 - DEBUG - safe_exec cmd: mount 2>/dev/null | grep ' on /backup type ' - return code: 0
29.05.2020-11:34 - DEBUG - Remove Lock: /usr/local/ispconfig/server/temp/.ispconfig_lock

Screenshot