

Check out Natsu-Mon: 21st Century Summer Kid. It’s not Deck verified, but it’s platinum on ProtonDB, so it should work. I played it on Linux (albeit not on Deck) with no issue.
You just get to be a kid in the summer in a small Japanese town. I grieved when it was over because I wouldn’t get to see all the friends I had made anymore or go fishing or hunt treasure or catch bugs…
So wholesome!
I emailed support about this, and they replied telling me they had adjusted some configuration to try to fix the problem. Seems like it was an unintended result of some other change.