Why my Android ESDK App doesn't detect liveness?

If your App detects a face but fails to detect liveness, please ensure that your code uses the High Sensitivity Face Detector. 

Note: RGB Liveness is only supported with the High Sensitivity Face Detector.

https://docs.real.com/safr/esdk/android/Mask_Detection_and_RGB_Liveness_Detection.html#RGBLivenessDetection