14e4:4727 broadcom wich has driver wl .. was not supporting injection in bt4 .. but looks in bt5 an update patch is done to it .. for being monitoring in new interface .. but no packets or even no client are connected are shown to me in my card .. i have same as yours
also if you test injection it says injection works ..
driver is still under develop
so i say to get a usb alfa better or to get any gd wireless card wich supports injection .. read more .. and you will find lot of informations..
REGARDS




