Yes, the Hogwarts game on the Deck was glitchy as fuck despite being "Steam Deck certified".

One of the problems was it kept opening files for content without closing the old files that are no longer used. Operating systems limit the number of files a single process can have open to prevent runaway processes and causing systems to completely hang. Linux is just a little more strict than Windows by default so the fix was to update a setting. It had obviously not been tested further than "well it starts".

But I think that's the joke.