Why is my feature flag experiment not recording events properly?

A feature flag experiment usually fails to record events for a handful of common reasons. The main ones are:

1. The exposure/event call isn’t actually happening

   • The flag is being evaluated, but no tracking/event method is called afterward.
   • In some SDKs, evaluation and tracking are separate steps.

2. The event is being called before the SDK is ready

   • If the flag client hasn’t fully initialized, the impression/exposure may not be sent.
   • This often happens on page load or app startup.

3. You’re using the wrong environment or project key

   • The feature flag may be active in one environment, but the experiment/reporting is checking another.
   • Verify dev/staging/prod settings and API keys.

4. Experiment targeting isn’t applied to the user

   • If the user doesn’t qualify for the experiment, no exposure is recorded.
   • Check rollout rules, segments, and bucketing.

5. Events are being blocked by ad blockers, CSP, or network issues

   • Browser privacy tools can block analytics/flag endpoints.
   • Look in devtools/network logs for failed requests.

6. The SDK is configured not to auto-track impressions

   • Some platforms require explicit “track exposure” or “send impression” settings.
   • Confirm the experiment mode is enabled.

7. Duplicate suppression or throttling

   • Some systems only record one exposure per user/session/flag.
   • You may be expecting multiple events, but the platform deduplicates them.

8. Wrong event name or schema

   • If you’re sending a custom conversion event, the name/properties may not match what the experiment expects.
   • Check required fields like user ID, variation ID, or experiment key.

9. Analytics ingestion delay

   • Data may be recorded but not visible yet.
   • Some dashboards lag by minutes to hours.

10. User identity mismatch

• The experiment may evaluate under an anonymous ID, but events are sent with a logged-in ID, or vice versa.
• Make sure evaluation and tracking use the same identity context.

If you want, I can help you debug it systematically. Send me:

• which feature flag/experiment tool you’re using,
• a snippet of the evaluation/tracking code,
• and whether this is web, mobile, or backend,

and I’ll narrow down the likely cause.