The Steam Deck OLED has had a bug with wifi 6, where higher wifi frequencies would crash the wifi chip requiring a reboot before WiFi would work again.
Specifically some RoG routers and Netgear routers seemed to be the most affected, requiring Steam Deck OLED users to use 2.4Ghz only or to disable WiFi 6 features (like 160mhz or “AX”) to be able to use 5Ghz.
Thankfully this update seems to fix it, I was able to re-enable wifi 6 on my Netgear router and it’s working great.
I’ve had that same bug without even having wifi 6. Maybe other routers in the area could have caused it? Curious to see if it’s fixed for me now, in any case.
Also, small correction: The update is on the preview channel, not yet beta.