HTTP versus OLAP Connection Type in HANA - the woes of Hierarchies and filtering

Hello:

I am using SAP DesignStudio 1.6 SP2 against an SAP HANA Calculation View, which has a Hierarchy.

I oberve two very different behaviors, when trying to filter the Hierarchy in the inital view for an OLAP Connection versus an HTTP Connection in DesignStudio:

1. In short the OLAP Connection works fine, and I can filter the Hierarchy to display for example one particular LEAF and some nodes at a higher level, see:
   
2. Sadly, when using an HTTP Connection this does not seem work, instead it allows me to only filter on the LEAF level, which is as I must confess very, very unfortunate indeed, see:
   

My Question: Has an anybody come across this issue as well? Or am I doing something wrong?

Thanks in advance.