Screenshot UI is visible on lock screen
I had the screenshot UI open in my GNOME OS VM when it locked itself due to inactivity, the screenshot UI was open above the lock screen when I came back to unlock it:
I'm not sure if screenshots on the lockscreen are a thing to begin with, but this behavior is unexpected regardless, IMO. Taking screenshots inside the session should be separate from the lockscreen (i.e. if I have the UI open it should be shown only once the session is unlocked).