For this PoC we took a node offline for a test and it appears that it caused the IOPs to no longer show. After bringing the 4th node back online we were able to see output again.
VxRail Manager is now showing zero IOPs for the cluster after rebooting vcenter. CPU usage and Memory usage are showing successfully, however Storage IOPs is still flat. We verified that we can see IOPs in vcenter and we have also tried to reboot the vxrail manager appliance. 
IOPs reading zero after vCenter reboot