Webinar content missing after being loaded/published

We run simu-live webinars globally, typically one per major region (Americas, Europe and Asia Pacific). We will load our MP4 file as presenter video media and load a slide to publish, then once the closed caption file is generated we review/edit and then we import that final approved webinar into our other two events.

We recently had an issue where two of our events had the slide and MP4 wiped from the webinar, as if it was never loaded. Has anyone else had this issue occur, where you’ve loaded/recorded your webinar content prior to the live date and reviewed and approved everything only to have it disappear?