I was able to get access to a Steam Deck for a bit and patched out the bugs pertaining to Steam Deck and other hand held gaming devices. The bugs included interacting with UI and party manager mode with the mouse cursor via joystick, and a crash at the Aghash boss fight. If you ran into issues previously, please give it another try!
Only issue withstanding is the game uses Xbox button icons regardless of controller used.
Also fixed a crash for any device that had no audio source.
Let me know if you run into any more issues, thanks!