I'm having a problem similar to the one that was supposedly fixed in Android 6.2.10 patch release (source) and that is; the camera feed is too dark and it's affecting the recognition performance very badly.
Device: Lenovo P2a42 (codename: Kuntao)
OS: Android 7.0 / Linux Kernel 3.18.31
Build number: P2a42_S244_170725_ROW
Thanks in advance!