When selecting Browse and Restore of a full backup, AVHD and VHD files are not showing as backed up.
Steps to resolve
The Hyper-V snapshot files (AVHD and VHD) are backed up by the VSS writer. It is believed that VSS only gets the current state, not the snapshot files, when backed up.
Until then, it is recommended to add specific inclusions to the file set of the client to specifically include the AVHD and VHD files.