Zoom API Add a webinar registrant with source_id

When I call the zoom add registrant API with the parameters below, it does create the registration record. However, it does not include the source_id field in the registration information. Likewise, when I retrieve the source registration record through the API, it does not include the source_id field in the results. Is this a known bug or am I using the incorrect field identifier (source_id)?

[first_name] => AARON
[last_name] => GORRELL
[email] => f04fv38myd@icznn.com
[phone] =>
[org] => ORG JCH
[industry] => Other
[state] => United States, Colorado
[job_title] => MR
[source_id] => jchemail

HI @akgorrell
Thanks for reaching out to us
I am doing some testing on my end and trying to get you a response as soon as possible.