User name is displayed on a User Picker custom field when editing issue

Problem Statement

Customer ID is displayed instead of Email address on a User Picker custom field when editing issue

Steps to replicate

1. Create a User Picker Custom Field
2. Add field to a Request Type
3. Create new Request and enter the Portal-Only User to the User Picker Custom Field and Create Request.
4. View the Request using Old Issue view and Click Edit Issue

Expected Result

Able to view the Customer by Email

Actual Result

The User Picker Custom field is displaying the user name (which for customer users this looks like UUID/codes qm:...) instead of the display name/email address.

Workaround

-