3426772 - OLAP Cache is not used for BW Query 2nd Execution

For a BW Query that can use OLAP cache and does not yet have OLAP cache:
When executing the query with a certain selection for the 1st time, it reads data from Database.
When executing the query with the same selection for the 2nd time, it still reads data from Database (instead of reading data from OLAP cache). 
When executing the query with the same selection for the 3rd or further time, it reads data from OLAP cache as expected.

BW
BW4HANA

twice execution, two executions, second execution, third execution, 2nd execution, 3rd execution, second time, third time, 2nd time, 3rd time , KBA , BW-BEX-OT-CCH , Olap Cache , BW4-AE-CCH , OLAP Cache , Problem