Answering call problem with flipcover case

[md6]

Hello,
I have a strange problem with my phone. I use the original flip cover case. When the phone is upside down (screen facing down) and a call comes. I pick up the phone and open the flip cover, I can see who is calling but the touch screen do not respond. I can not control the call, I have to press the power button twice so the screen closes and opens, then I gain control on the screen.
This problem does not occur when I use the phone without flip cover case or when I leave the phone with screen facing up.
Do you have this problem with your phone?

 

[md6]

I have this problem with all roms that I tried. But when I use an auto screen on off program for flip cover phones, my problem solved. The program make my phone awake all the time, it seems disturbing at the beginning but I saw that the battery consumption of my kitkat rom decreased while my phone is idle (screen off). Normally my kitkat rom uses 4-5% per hour when screen off but with this program it decreased to 1.5-2% per hour. So I also found an indirect solution for my kitkat rom that do not go into deep sleep

 

[md6]

Also I noticed that the cpu usage is high (1209 Mhz) while the screen is off, so I used a cpu tuner program to reduce it while screen is off. And the battery consumption reduced to nearly %1 per hour while screen is off.
A rom developer can use this and write a code that awake the phone but not using battery like auto screen on off program.