I just wanted to chime in,
had the same problem on Windows 11, turning on Steinberg power plan kinda “fixed” it.
But just fixed it in the way that now I play stuff and doesn’t stutter but it’s still very cumbersome.
I was programming a pedalboard today, and a streamdeck the other day, for some reasons it seems to hang up every now and then. I press 10 buttons on a pedalboard to test them, 9 times they go well and the 10th input is read after couple seconds (the numbers are just arbitrary, it’s not that precise).
On the streamdeck I was testing keyboard shortcuts and was the same, every now and then the key wasn’t registering or was happening later.
None of this ever happened on C11, I run a i9 9900K with 32GB of fast ram, with a RTX 2080Super.
I’m just disappointed that the previous Cubase worked super fine, so it’s definitely possible to have a DAW run well 