Fixed Price Service Receipts created using REST services

Summary

Item description is not populated when Fixed prices service lines Receipts created using REST services

Content

We are using REST services to create the PO Receipts where we have an integration with an App to create receipts. 

Problem here is with the description of the Item / Line description for Service lines. Our observation is that the Receipt created for Goods lines are created with description populated.   I have attached the screen shots for reference.

Any one has faced this or any thoughts ?

Attached both the images here 

Thanks,

Suresh