Hi team,
A security enhancement could be to hide sensitive data on screen when the application was in background mode and a user is waking up the app. With fingerprint pops-up, the data in behind can be seen.
i.e : user was checking/backuping his private key or seed words, and let the app goes in background, performs some tasks in parallel and decide later to go back to the app, user is prompted to use his fingerprint, but in fact you can read this sensitive datas without authentication in behind (private key or seed).
Regards.