I've run into the same problem and the unfortunate answer appears to be that most of the methods you'd want to use to calculate intersections don't work in the round-earth SRID.
This thread seems to have turned into a collection point for what's working and what isn't in HANA geospatial: Hana SPS07 and spatial data
I've tried your experiment on my brand new SPS09 and was able to reproduce it.
As for workarounds, the only suggestion I have is to use the flat-earth version, SRID=1000004326, but be aware that distance and area calculations will not be accurate.