Twitch Studio GPU priority over games
Make Twitch Studio take priority over other applications for GPU.
(like OBS recently did by starting OBS as Admin)
Twitch studio doesn't get enough GPU processing power when playing demanding games because the games use close to all GPU power. So the game looks fine for the player/streamer but it lags on stream.
Run as Administrator, could also see if you can find the running process (in details in task manager) and increase its priority x