Follow the report to its destination.
- Export requested
- Export completed
- Download failed
Choose a boundary your application can actually observe: a valid file made available, an authorised download, or a confirmed client result. Do not call a button click proof of successful delivery.
See the failed result and who it affects.
Repeated supported failures can become one incident, with affected users and the events behind it. Open the incident to investigate the task rather than searching unrelated logs.

An empty report can be correct.
Some filters legitimately produce no rows. Configure evidence that distinguishes this from a broken export. A missing download event alone remains unknown; a failed download response or invalid output can provide explicit failure evidence.