It looks like the fallback recording URL is pointing to Amazon S3, while the primary one is Vapi’s storage. If the S3 link isn’t accessible, it’s usually because the bucket or object requires signed access or isn’t publicly exposed. So it may be acting as a temporary or backup storage, but without the proper permissions the recordings can’t be retrieved. I’ve helped troubleshoot similar Vapi recording and storage issues, so I can help check the webhook, storage settings, and permissions to make sure recordings are consistently accessible. @Chris