At the end of the prologue cutscene where the ship crashes, the steam deck became totally unresponsive in a black screen while a sound effect looped. None of the steam deck buttons were working so I had to hold the power button down 5 secs to reset. After rebooting and reloading the game, I had lost the progress and it wanted me to replay the prologue so I switched to my PC and was able to complete the prologue without issues there.
Was playing on the default settings. Not sure how to grab debug info from Steam Deck (OLED, 512MB version). Steam deck is completely stock all I have done is install and play games directly from steam.