I experienced a bug saving my Z Depth pass. When saving CXR format from Max, the z depth pass falls out of the file, not present in CIE. Also not present when auto saving individual passes to CXR from batch render. I have to save this individual pass out from the Corona VFB inside Max.
I haven't tested other CGeometry passes, but I can say for certain there's an issue with CXR including z depth. It has occurred on files saved from the 9-15-2017 (first 1.7 daily I tested on my office workstations) daily to RC1.