When syncing to Hubspot, ChiliPiper only looks for the primary email address. If someone books using a secondary email (that is in Hubspot as an additional email address), ChiliPiper thinks the contact doesn't exist and tries to create a new contact. However, Hubspot won't create that contact because it does already exist.

ChiliPiper either needs to be able to look at all possible emails or send a notification when a new contact can't be created. We have automations in place that then don't run because of this deficiency.