I had two of my games crash constantly, Hitman WoA and Star Wars Outlaws. Hitman had always run flawlessly, until I installed the KB that optimises 3D V-Cache performance in Windows 11 23H2.
Star Wars Outlaws was crashing every 5 to 10 minutes right from the start.
The only other thing in the last quarter that had changed in my software environment were driver updates along the way. Checking those I realised that with the last chipset driver update I accidentally installed AMD's 3D V-Cache Optimizer service. I run a Ryzen 7800X3D without a second CCX that necessitates core parking and don't need that service.
I deactivated the service. The crashing of the aforementioned games stopped instantly.
My best guess is that MS's optimisation and AMD's service don't play together nicely.