Agent's "Issues in progress" queue does not return issues for upper cased users

Steps to Reproduce
Create a user with upper case letter (e.g. UpperUser)
Assign a newly created service desk request to the user
Check the People > Agents page of the Service Desk portal

Expected Results
UpperUser has have one ticket in progress

Actual Results
UpperUser remains with 0 issues in progress

Workaround:

• Edit the username to lowercase