Hovering over the Virtual Machine backup status icon shows Consistency as crash consistent.
When you perform backups from the Applications panel, application consistency is ensured by Hycu. However, when you perform backups from the Virtual Machines panel, VSS-based application consistency is achieved by using Nutanix Guest Tools (NGT). Therefore, not having NGT installed and configured on the client virtual machine will make Hycu fallback to crash-consistent snapshot.
Make sure that the NGT software bundle is properly installed on the client virtual machine. For detailed information about installing and configuring NGT, see Nutanix documentation.