Starflake reflection refresh

does starflake reflection support incremental refresh?

i have this simple scenario

tables A,B - both are file based sources and set to incremental refresh
have a raw reflection on both A, B at PD level
created VD as A left outer join B
made a raw reflection on this VD
when refresh on either A or B is triggered, PD reflection is incremented correctly.
but VD reflection is doing a full rebuild