Redmi 4x doesn't work finger print when encrypted data

Device: xiaomi redmi 4x
Affected version: MK71.2-santoni-180515-RELEASE
Bug description: Then data is encrypted the finger print doesn’t work after reboot. Only new fingerprint input help.
Steps to replicate: 1. turn on encryption 2. Input fingerprint. 3. Reboot. 4. Try to unlock with fingerprint

i think…
read it ↓