In case you have not seen these :
Windows 10: audio dropouts on multi-core CPU setups
So Steinberg officially says the problem is gone in version 10. But a lot of reports on forum and outside tend to say otherwise.
10.4 upwards has been a slight desaster performance wise and that has been well documented in the forum
from:
Cubase 10.5 multicore managing
It concerns Asio Guard vs the real time engine. These are posts from the same huge thread :
Quick update on the MMCSS situation with Cubendo (GearSlutz)
We have further optimised Cubase 11 […] (GearSlutz)
https://www.gearslutz.com/board/showpost.php?p=15102251&postcount=291
https://www.gearslutz.com/board/showpost.php?p=15103553&postcount=300
Recent one from 2020-11-12 on Cubase 11 :
https://www.gearslutz.com/board/showpost.php?p=15104291&postcount=302