Container values are not getting populated in the Mail Body

Problem Statement

Trying to send a simple mail using the standard workflow send mail step. Trying to populate some variables which are Attributes of the BOR, some are Database and some are Virtual.

When I see the mail in the Workflow log, attributes are getting populated properly, both in Subject and Mail Body.

But when I receive the mail in SAP Workplace, some of the container values are not populated in Mail Body, where as the same set of attributes are appearing just fine in the Mail Subject line.

I also created Task container elements and did the binding with the Workflow container BOR attributes.