Why Comodo Mobile Security are not able to continue the scan with screen off?

Hi, I Am using Comodo mobile version 3.5.3306 on Android Lollipop 5.0 Samsung Galaxy S5 ; when I press scan there are many apps to scan and when after 30 seconds the screen turn off the scan is paused. I need to continue to take screen on and touch with my fingers for let see the scan continue. Why are unable to do the scan in background?

Hope this will be fixed.

I have noticed the same thing on a Samsung Note 4 SM-910T running Android 6.0.1.