[QA] Events | Incorrect user count displayed for events

### Build version
Not specified

### Issue Description
The event "Cartoon Nights at Chiri's" currently shows 42 users at decentraland.org/whatson, but at the event there are only 5 users. The user count displayed on the What's On page does not reflect the actual number of users present at the event.

### STR (Steps to Reproduce)
(Can be checked with any event)
1. Go to decentraland.org/whatson
2. Find the event "Cartoon Nights at Chiri's"
3. Observe the user count displayed (shows 42)
4. Join the event in-world
5. Observe that there are only ~5 users present

### Expected Result
The user count shown on the What's On page should accurately reflect the number of users currently at the event location.

### Actual Result with evidence
The What's On page shows 42 users for the event, while only approximately 5 users are actually present. See screenshots from the original report.

### Reproduction
Unknown

### Operative system and additional Notes
Windows

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Reported by Bay
Requested by Ani Albano via Slack

Start by reproducing the issue at decentraland.org/whatson with “Cartoon Nights at Chiri's,” then compare the displayed count with the users present after joining in-world. The report names no source files or tests; done means the What's On count accurately reflects the users currently at the event location.

Written by the indexing model from the issue text.