I noticed that the exact same event is firing twice, usually within less than a second (via event stream in “View Users”). It’s not possible for the user to do this. This is not observed in QA.

For the double-fired events, I will only see one of the two events listed in the user’s log. When I use the search bar to look up the event name, then I’ll see the count as 2. If I click the up/down arrows by the search bar, I then see the second event’s info on the right panel. It’s still not listed in the user’s log. Why is it hidden?

The incorrect event count seems to be reflected in chart view. 

In the raw data, I saw the double-fired events have different libraries. One library is “amplitude-js/5.2.2”, and the other is “segment”. The event IDs, timestamps, session IDs, and insert IDs are also different. Is that why the events weren’t deduplicated?

Is this a set-up issue or a bug with Amplitude?