Both are working as intended, frame rate mode does not show your FPS it shows the refresh rate that your GPU is outputting to the display. Your backlight also will turn on not by itself but by AWCC, if you want it off you need it off in AWCC and the monitor settings 
Hello. I have two problems. First. The backlight randomly turns on by itself but in the settings it is turned off. It bothers and annoys me. [IMAGE] Two. Game Enhance Mode "Frame Rate" does not work properly. When I enable this function, I do not see the display of the frames per second, but only the icon of the monitor refresh rate (60Hz, 120Hz, 240Hz). [IMAGE]
AW2521HFA, RGB backlit turn on by itself, Frame Rate dn't work