Hello,
Its very doubtful this is a memory leak for this revision.
Have you tried querying the memory allocators during the time of the high memory utilisation.
Please go to note -1969700 - SQL statement collection for SAP HANA.
Here you will find the SQL you can run to check the Memory_Overview + Memory_TopConsumers.
This will allow you to check the highest allocators in conjunction with Note 1999997.
Please also see 4422 - SAP HANA: Analysis of Out-of-memory (OOM) Dumps.
KR
Michael