Fingerprint authentication speed is very slow. Sometimes it even doesn't recognise fingerprint. I've to turn of battery optimization for fingerprint scanner but after some times it become slower again.
Hi, we'd request you follow the below steps:
1. Clear system cache.
2. Please try to enter "Safe Mode". If the function works well in Safe Mode yet the issue remains out of Safe Mode, please check for any disturbance from the installed 3rd party apps.
# How to enter and exit "Safe Mode"
3. If still you face the issue factory reset your phone after
taking a full backup : https://www.asus.com/support/FAQ/1006346/