The event had indexed at 10:00 AM, but when I search for the same data at 10:15, I just got "No results found".
However, when I search at 10:20, I got the data. (I didn't make any changes on the search which I ran)
How to increase the immediate availability of data in an indexer clustering environment?
Did you receive any sort of errors when you ran the second search? This doesn't sound like any sort of expected behavior.