(new) Fault Tolerance with VDP 6.1

Environment: Using vSphere / ESXi 6.5.0d, the latest corresponding vCenter (build 5318154), the new (not legacy!) Fault Tolerance, and VDP 6.1.  vSphere HA is configured correctly and is protecting about 75 VMs.

Problem: Every time I want to save my HA cluster settings I am getting an error like "Storage Protection will be disabled," for FT-enabled VMs, and do I want to proceed.  If I say yes, sure enough, when I went to look at my regular VDP daily backups, all machines for which I had FT enabled were no longer being backed up.

I thought all VADP-based / vStorage API solutions were supported with the new FT, is this not the case for VDP itself?  FWIW, I am using vSAN 6.6 (disk format 5) datastores for the VDP appliance and for the FT VMs, but I didn't think this would matter.

Any takers?

Thanks in advance...