What could be reason that there are no data available after grouping using a transaction command? Before grouping using a transaction, there are data available.
If I understand you correctly, when you do bare search it returns some even but after adding a transaction command to it, you don't get any results, right?
Are you sure you're specifying existing field with the transaction command? If you specify wrong field, you won't get any transactions.
You likely have no events that meet the criteria specified in the transaction command. Please share your query and some sample events.
There are events found, But there are no data showed in the list.
Again I ask you kindly to share the query and sample (sanitized) events.