[Bug]: Duplicate events shown in the UI #3399

Steps to reproduce

1. Create at least 21 events.
2. View them all on the Events page by scrolling down.

Actual behaviour

Every 20-event batch (except the top 20 events) is duplicated.

For example, this screenshot shows the start of a duplicated batch. You can see that instead of descending gradually, timestamps suddenly just to a point of time that was already shown above.

Additionally, every request to /api/events/list is duplicated with the same parameters as you are scrolling.

Expected behaviour

No events are duplicated.

dstack version

0.20.0

Server logs

Additional information

The same issue is present in event tables added on Run, Job, and Fleet pages in #3392.