I know this was some time ago...but was this fixed?
I'm having the same issue. On-demand backups give me the option to choose "Distributed Application Consistent Backup" However, when creating a backup policy to schedule backups, I do not have this option leaving me with snapshots for each HyperV hosts in the volume used for SMB3 Snapmanager HyperV version 2.1.4
Thanks, Rob