Partial screen lock bypass via keybindings?
I noticed that on a locked Gnome screen, when you right-click on the password text field, certain keyboard shortcuts are re-enabled.
Example1: right-click, the small menu (copy/paste/...) appears, then press Super+F10. You can now see the front window menu, and eg you can close the window, or change its parameters, etc.
Example2: right-click, press Alt+Screenshot, and a screenshot of the window is taken and saved in the user's Pictures/ directory. It means that someone can fill the disk with images.
Example3: press Alt+Super+S, and sometimes, Orca starts spelling you the content of the window (which is supposed to be secret since the screen is locked). It does not always do, not sure why. Note also that by then enabling the virtual keyboard (by clicking on it in the accessibility button that appeared on the upper-right corner of the screen), you can then open (in the session, but not in gdm) the accessibility menu.
All of that doesn't look really intentional to me.