This is likely because the app has been cached by the OS and then once it loads realizes it needs to prompt for authentication again. I see the same thing happening with work apps like teams and Outlook where it opens to what I had been previously looking at before locking and asking for authentication.
It’s moderate at making up npc statblocks if I give it a description and a CR. I do find myself having to tweak the numbers a bit but it’s great for coming up with special abilities or unique spell like effects.