ActiveStorage::PurgeJob called under high throughput

I am attaching files via Active Record in rails via S3 in async jobs. Occasionally, an object will be uploaded, the job will complete, and then "Performing ActiveStorage::PurgeJob" and "Deleted file from key" will appear in the logs. The key will no longer be accessible in s3. I am not triggering this purge in my codebase. This does not happen every time - but often in times of high throughput.