Query Tab in UI: long running query shows interrupted status even though its still running when we click on previous button

On ycsb cluster, issue this query:
select * from default where field1 is not missing;
It shows correct status.
Click on previous button to view old queries and come back to the running query,the status shown is interrupted.
But when you check the status by:
cbq> select * from system:active_requests;
The status of query is shown as running:
{
"active_requests": {
"ClientContextID": "c8a1e290-3ea7-49a9-93e3-fc7892e81770",
"ElapsedTime": "8m53.282345359s",
"ExecutionTime": "8m53.282281922s",
"PhaseCounts":

{ "Fetch": 234480, "PrimaryScan": 234926 }

,
"PhaseOperators":

{ "Fetch": 1, "PrimaryScan": 1 }

,
"RequestId": "5f31a31a-afa0-4c24-a234-a88ab68ed39f",
"RequestTime": "2016-04-05 12:54:01.549254995 -0700 PDT",
"State": "running",
"Statement": "select * from default where field1 is not missing;"
}