The problem appears even when I regenerate the DF's or DataStores. I suspect some discrepancy between HANA and DS, maybe driver (code page).
When I debug the WF the variable is behaving normally, but once it's send to HANA it's somehow translated to weird Chinese/Japanese characters.
EDIT: I forgot mention that our DS Repository is stored on MS SQL Server 2008 R2 - connected via ODBC v 6.01.7601.