Thank you very much, good to know that there is a place to look after missing backup files, I actually found a couple in moodledata/temp/backup/. I do have my automated mbz files stored separate from Moodle on the server, mainly for the same reason as you mentioned.
I understand "Many servers fail at the last step..." as there isn't really anything I can do about it, I just have to look for the backup.mbz if I miss a backup file? I also guess that there is no reason to create a report in the tracker?
Thanks again & best regards