Reordering AV files in an Event doesn't change order in admin or published site

I reordered these AV files under Event settings and saved the new order:

<img width="1261" height="693" alt="Image" src="https://github.com/user-attachments/assets/1684d355-c17c-46c7-a0d7-f3bd8771f6de" />

However, the AV files appear in the original order:

<img width="1215" height="701" alt="Image" src="https://github.com/user-attachments/assets/a0615aae-7142-4167-aea3-a173e85f03b5" />