Backups to FTP not showing in "Backups" Tab

I’ve configured two backup jobs. One witch runs weekly to a folder on my webhosting and the second witch runs monthly to a ftp-server.

Regarding the log, both jobs runs without any failure.

But in the “Backup” tab there are only weekly backups showing. No possibility to switch to the monthly backups on my FTP.
Checking the ftp-server, there are all monthly backups correctly saved.

Starting a monthly backup manually bring back the possibility to switch between the different backup-locations in the “Backup” tab for a limited time.

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