Help: Custom events are doubling in count for some reason.

I'm conducting a performance and reliability benchmark for several session replay tools, including Fathom. During the integration test phase, I've encountered a data integrity issue that is skewing my results.

My test setup involves a controlled sequence of user interactions on a staging environment, each tagged with a specific custom event. The instrumentation is straightforward, using the standard Fathom script. However, my analysis shows that the count for certain custom events is approximately double what my test logs indicate should be present.

I've isolated the code to a simple button click handler:
```javascript
// This fires on a single, deliberate button click in my test
fathom.trackEvent('benchmark_action_click');
```

My test protocol executes 50 precise clicks, but the Fathom dashboard reports between 95-100 events for `benchmark_action_click`. Other events, like pageviews, align with expected counts.

I have ruled out:
* Duplicate script inclusions on the page.
* The event firing in rapid succession from multiple event listeners (my test controls for this).
* Local storage or bot traffic (staging environment is isolated).

My current hypothesis is a potential conflict with SPAs or event batching, but the documentation hasn't clarified this. Has anyone else performed rigorous event validation and observed similar discrepancies? I need to identify if this is:
1. A implementation flaw in my benchmark setup.
2. A known SDK behavior (e.g., retry logic on perceived failure).
3. A genuine bug affecting data accuracy.

Any insight into Fathom's client-side event deduplication or delivery mechanism would be crucial for my evaluation.