Valve have released two small updates to the Steam Deck OS (SteamOS) and here's what's new and improved.
Firstly, they've released SteamOS 3.4.4 which fixes an issue where a factory reset could cause the device to get stuck in an update loop. That's a bit of a woops, quite a huge one really, since that's supposed to be one of the last resorts to fix problems on Steam Deck.
SteamOS 3.4.5 is also now in Preview, which includes the above change and also fixes a focus issue with Forza Horizon 5. That was originally in 3.4.3 Preview, but re-released as 3.4.5 when 3.4.4 went out above for the emergency factory reset fix, so clearly they're not yet ready for the Forza Horizon 5 issue fix to be in stable (I assume because the fix might affect other games and needs more testing time).
Valve had quite a few problems with the roll-out of SteamOS 3.4, which was a pretty big update, like SD Cards moving location with no real notice and HDMI / DisplayPort audio issues so hopefully they will take on some lessons from the release to make SteamOS 3.5 a bit smoother.
I did have a weird one recently with sleep / wake. One of my Steam Decks would wake up by itself, and it happened multiple times in a row. Had to fully shut it down for a while to make it stop doing it — annoying, and I'm not alone with this bug. It somewhat reminds me of my PlayStation 4, which repeatedly woke up and spat discs out in the middle of the night, until I physically ripped out the eject button after Sony failed to fix the problem.