SAP HANA rev 56 performance

Hello, what can you say about the performance of rev 56 ?

I our case we have a query which takes in rev 48 2,7 sec.

Now in Rev 56 it takes 12 Sec. Do you have an idea?

In the end of the query some sub queries are joined together. there are only 3k records per sub queries and we have 7 sub queries.

This join takes about 10 Sec. For each join we have 3 conditions.