[macOS Big Sur 11.1, Illustrator 25.1]

When saving as a protected PDF (require a password to edit/copy), as soon as you click the checkbox to enable that, the text insertion point always used to jump immediately to the field to enter the password. Now, nothing happens. You have to click the box. There are no other options in that area of the Save as window; you click the box to enable a password, and the only other option is to then enter that password. Always before, text insertion in that field activated immediately upon clicking the checkbox. Now, no. That's silly. Text entry is the only next step. There is no other step. You've just added a completely unnecessary click to something that never had one before. Please change that back.