I just received a notification from support so tapped on that to open Monzo, was faced with the unlock screen but couldn’t access the buttons because the keyboard popped up (it was not up in the previous app, telegram). Had to force quit to be able to access.
I’ve had a similar issue in the last few days when I used the chat and then clicked on a notification of a chat reply to open Monzo.
I don’t have the app set to need Face ID to unlock, but it just gets stuck on app loading screen, with the keyboard, and have to force quit.