For some reason I can't seem to be able to spot other vehicles when flying a jet. I've assigned the "spot / communications" key to a joystick button, keep flying directly at vehicles and hit that button, but nothing happens. If I keep the button pressed, I see the com menu, so it must be assigned correctly.
I should probably also note that I am playing in Hardcore mode.
Is this a known limitation (perhaps with the new BF3 patch or on Hardcore servers only), or am I doing something wrong?