Cubase 10 not using all cores on 6950x

Additionally, DawBench is run with asio guard OFF. I see now that Cubase 10 uses all 10 cores (20 hyperthreaded) running DawBench when asio guard is ON, but only 9 cores when it is off . Cubase 9.5 uses all 20 cores with asio guard on OR off.