Pardot API integration moving registrants to 'No Show' list before the webinar has happened

I have set up the Pardot to Zoom integration and configured the integration for generating prospects in Pardot via lists for each of our webinars. It seemed to be working fine at first, but now the API has added all the registrants to the ‘No Show’ lists a week before the webinars are scheduled to occur. I am not receiving any error messages and I did go into each configuration to confirm the list set up did not change on our side. I have looked at the audit trail on a few of the prospects and can confirm the API is adding them to the no show list right after the registration list.