Check if apps been up to date.
Also you can wipe cache partition on your phone :
https://www.samsung.com/uk/support/mobile-devices/how-do-i-clear-the-cache-on-my-device/You will need to plug your device to TV, PC, other phone through USB beforehand.
Delete and register your fingerprints again.
If you have screen protector revove it or check if there's damage, even if your dont have screen protector still check for scratches where fingerprint is.
Report it through the members app.
