Illustrator v. 26.3.1 on 16 inch, 2021 M1 MBP running MacOS Ventura(13.0.1).
When I save a file, I typically arrow over to the end of the autofilled filename to remove the end of it and add what I want to add per my file naming system. However, when I press any arrow key on my keyboard, the "save file" dialogue box closes, and I have to initiate the process over again. No other keys cause this issue to occur, only the arrow keys. I do use an external keyboard, but in testing, the arrow keys on the built-in keyboard produce the same result.