Wake up TV by CEC when switched off from TV remote

Device: Rasp Pi2
Peripherals: Wireless USB keyboard
OSMC version: 2015.07-1
XBMC version: Kodi (15.1-RC1 Git:Unknown). Platform: Linux ARM (Thumb) 32-bit
Audio/Video Output: HDMI
TV : Samsung UE40D5700ZF

I just switched from OpenElec and have a little problem with CEC that I hadn’t before.
I used to turn off the TV with my samsung TV remote, and waking up by a hit on any key on my wireless keyboard.
Now I have to turn the TV on with its remote.

I tried to find an option in the CEC Hardware screen and configured my device to suspend the TV when iddle, and this way my TV is switched off automatically and now wake up when I hit my keyboard, yoohoooo.

Just curious, why is the behaviour different and do you have a solution to have my tv waked up from any hit when turned off via its remote ?