Hi, the game runs great on my Steam Deck OLED but I regularly have an issue where performance slowly gets worse over time, with TDP increasing and FPS going down, it just ends with the game going at 20FPS with 11W TDP instead of 6W.
I feel like going back from sleep mode tends to make the issue happen more easily but I'm pretty sure I've got the issue without going to sleep.
Also, when going to main menu and then back to the run, it goes back to normal.