Looking at the logs on my unit the backups are created once a day and for me at 17:00 CET. To me it seems the backup time is not using the controller local time. I’d rather have backups at 3AM as the unit goes to some kind of locked state during the backup. 5PM is not a good time to do that.
The list of backups is now also showing the one per day, at indeed 17:00 local time.
So, there seems some side effect of how log file uploading is set and what is listed as ‘backups’ in the hub.backups.list command.
IMO you need QA to have a good look at this again.