This applies to playing the game in Desktop Mode of the Steam Deck, either in fullscreen or windowed.

Text entry, while it will work via plugged-in keyboard, will not allow you to advance or exit the prompt. This includes when de-docking the Steam Deck in order to use the built-in keyboard. Cannot launch the Steam Deck keyboard through chord while this is present. Need to close the window (you will get the "Are you sure you want to exit without saving?").