Redmi 2 (2GB) - HM2XWC - When I get call on SIM2 from a contact (Having Contact Pic) then screen will not turn on automatically...I can hear ringtone with black screen..Need to press power button to turn on the screen and then answer call. This problem in MIUI8 from very first build..I was just waiting to get it resolved but in today build..same problem.
EDIT: It doesnot matter whether contact is with pic or not. Screen will not turn on automatically when u getting call on 2nd SIM..as soon as call get disconnected..screen will turn on with missed call notification. Very Strange issue