Prefill no longer working with profile link in Calendly.initPopupWidget (worked earlier)

Hi everyone,

I’m using Calendly.initPopupWidget to open the scheduling popup with prefilled invitee details.

Previously, I was using a profile link like:
https://calendly.com/username

and the prefill data (first name, last name, email, customAnswers { a: xxx, a2: xxx}) was working correctly.

However, recently this stopped working — the popup opens, but none of the prefill fields are populated.

When I switch to an event-type link like:
https://calendly.com/username/xxxx

the prefill works again as expected.

 

Questions:

1. Has there been any recent change where prefill is only supported with event-type URLs and not profile URLs?
2. Was this behavior (prefill working on profile links) ever officially supported, or was it incidental?
3. Is there any recommended way to support prefill when using profile-level links?

Would appreciate any clarification or documentation references.

Thanks!