Thanks Masa for your time. As you can see we have also reported this incident to OSS and was waiting if there was any response from OSS I could relay that to you.
The Benefits Data can be seen for the employee using the standard benefits Tx. HRBEN0003, HRBEN0072, etc. As I had communicated here or OSS earlier, we had a breakpoint in the DPC class and it did not have the employee number there.
I took the OData URI and checked it at the Gateway client like you mention in another of your super helpful, super cool blog SAP Fiori LL11 - Consultants should know about OData troubleshooting
and it doesn't return any data. You add employee number it fetches. That sure seems like a SAP program bug.
Screenshots to better explain what I have said above.