Issue retrieving webinar registrants

API Endpoint(s) and/or Zoom API Event(s)

/meetings/{meetingId}/registrants
/webinars/{webinarId}/registrants

Description
I have a small issue with the Zoom API. When retrieving the participants of a webinar, one of them does not have a “last_name” field. However, this field is required to join our meetings/webinars.

What’s even more confusing is that, when retrieving the participant list through your interfaces, the person does have a last name.

Error?
Only first _name attribute is available, it contains the lastname and the firstname concatenated

How To Reproduce
I don’t know yet, issue happened on one registrant and webinar for now

Hi @Lucas_Lyv , if it’s just one user, do you know how they inputted those details? What was their entry point for registration?