Why does the fingerprint recognition of the POCO M6 Pro become abnormal after replacing the screen protector?

Thank you for your support for Xiaomi products. The material used in the special in-screen optical fingerprint protector is different from that of the ordinary PET protector, and differences in manufacturing processes can lead to variations in parameters, which will result in fingerprint recognition issues. It is recommended to purchase and use in-screen optical fingerprint-specific protectors made of materials such as SRF or OCF.
If this issue persists after replacing such a protector, please go to the after-sales service center for further inspection.