CF bug? or maybe jdbc driver something?

have a specific query that for unknown reason takes >20sec to load from a CF page but it's instant when ran directly on mssql studio

notes (Datasource=db2, Time=39320ms, Records=20) in  @ 08:05:54.054

SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED; 
SELECT TOP 20 id,productId,itemID,createdOn,message,createdBy,comments,manual,logType,qty,dataid,qtyOnHandAdj 
FROM inventoryLog WHERE itemid = ? 
AND logType <> 9 
ORDER BY createdOn Desc 

Query Parameter Value(s) -
Parameter #1(CF_SQL_INTEGER) = 40483

i played around with the TOP N.   ONLY TOP 20 takes long.    TOP 19,21,25,50 whatever all take milliseconds

i played around with column list.  

if i exclude the dataID column, it's instant.   

if i alias dataID as something, it's instant.

if i alias dataID as dataID,  it's instant.

so it's only bad when TOP 20 and dataID without alias.

in CF2018 update 4