I have an incremental backup starting 22:00 and with active fulls on friday.
If in the thursday night backup VMs will fail in the first try, it will be retried but after midnight making it officially friday and the backup of those VMs will change to active full. It's not even trying to hide it, the job log entry will simply change from "Backupname (Incremental)" to "Backupname (Active full) (Retry 1)".
The problem is that if it happens changes are it's on big VMs like fileservers and causing extra delays for possible backup copy jobs, in our case turning a backup+copy from a 7 hour run into an 18 hour run.
I could change the schedule of course but i'm guessing this is not intended behavior but correct me if i'm wrong.