The sound is still going, i could also input and have sound feedback, meaning the game is actually still running, but the graphic completely freeze. This happens everytime i Alt-tab out and back in.
Game that i’ve tried, Rise of the Tomb Raider, Shadow of the Tomb Raider, Horizon Zero Dawn, Final Fantasy XV etc.
Especially Rise of the Tomb Raider since it need to use HDR feature of SK, without exclusive fullscreen, the color will get distorted.