This is only happening when playing with a controller. It appears as though gamepad commands are going out of the game and triggering things in Windows.
This happens with Steam Big Picture and the Desktop client.
My thinking is this has to do with some recent Windows change. I haven't played games in 3 months, so I'm wondering if a recent Windows or Steam update changed this behavior.
Steam Version: 1689034492 Steam Client Build Date: Mon, Jul 10 8:02 PM UTC -08:00 Steam Web Build Date: Mon, Jul 10 12:48 PM UTC -08:00 Steam API Version: SteamClient020