I have had my SD for a few months now and I have only one bug which seems to be recurring:
When I resume a game from sleep, occasionally (rarely), the game runs fine but the audio is sped up. It's a bit weird. It usually solves itself while gaming in the following minutes but it's unclear to me what causes it and what solves it. It happens in GTA IV, GTA V and the Witcher 3, but it's hard to say if it's only on these games or if it's on these games because I've played them a lot. Anyone else experiencing this bug? It might happen every 50 resume from sleep? Not sure...
I haven't gotten sped up audio after waking from sleep, but sometimes the audio will be "crackly" and the only thing that'll resolve it is closing the game and restarting it. I used to use Decky's SDH-PauseGames plugin which fixed the audio issue, but it turned out that just having Decky installed was causing a few games to freeze constantly (even without any plugins enabled) so I uninstalled it. That was a while ago though so I dunno if this is still a problem with the current Decky version
Fallout 4 and Starfield (yes yes I know) were the ones I saw the most freezes with before uninstalling Decky. Not really surprising considering Bethesda's code quality, apparently both games do a lot of very… uh… creative API calls. There were others too but I honestly can't remember which ones anymore