Developer was receiving timeouts and 401s for certain webhooks.
Developer shared in response that infrastructure team was doing maintenance on their test environment around that time which could be why there were timeouts. That should be resolved now.
As for the 401s, developer suspected that all webinars giving 401s in webhook response have special character in the title. They think that this special character (long dash) is causing our systems to generate different hashes, which is breaking the webhook verification.
Could be related: