Webinar registration webhooks not firing

Description
The webinar registration webhook does not fire when someone registers for a current webinar on our account. The webhook URL is fully validated and we’ve used webhook apps for other endpoints without problems. Not sure if there is something about our webinars that I’m overlooking. There is nothing in the logs.

How To Reproduce
Steps to reproduce the behavior:

  1. Have current webinar open for registration
  2. Create ‘webhook only’ app that subscribes to ‘webinar.registration_xxxx’ events
  3. Register for webinar using new name / email address
  4. Confirm no webhook event is fired and nothing in the logs

For whatever reason the webhook did fire today. Not sure if it needed time or if somehow our testing of registering didn’t trigger it.