All Steam OLED Decks are affected, it seems, as this is a design issue:
Valve has also begun responding to Support requests stating that service can be performed to fix the issue per reports in the above thread.
I have yet to receive a reply on my ticket confirming that service will be performed for me, but I just sent them an update inquiring about it.
Depends on whether you use 3.5mm audio, as some to all of the current line of Decks have a design flaw that causes issues with it.
I use my Deck docked a lot, but also with a 3.5mm audio switch. I’m currently in discussion with Support about whether they’re going to fix it or provide me a full refund. It seems they’re offering a fix to others, so we’ll see how it goes.