Agents with numeric usernames do not get populated as default values in the "Raise this request on behalf of" field when creating issues in the customer portal

Issue Summary

When using an agent user with a numbers-only username, the "Raise this request on behalf of" is not automatically filled with the logged-in user as expected.

This is reproducible on Data Center: yes

Steps to Reproduce

1. Create a user with a numeric username (ex.: 12345)
2. Create a JSM project
3. Make the user in step 1 an agent of the project in step 2
4. Using the user in step 1, try to create a request

Expected Results

The “Raise this request on behalf of” field should be filled with the logged in user

Actual Results

The “Raise this request on behalf of” field is displayed empty and needs to be manually input.

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available