If it helps, I have a scenario that I created using Iranian F-14s. They activate the FCR radars, and fire their Phoenix missiles at their airborne targets as designed. When the US planes target the Iranian F-14s, the Tomcats have to turn to avoid the incoming US AA missiles. When the F-14s turn, they break contact with their own target, and their Phoenix goes blind, as it should. Since the Phoenix wasn't close enough to activate its own radar, it ends up self-destructing. The bottom line is, everything seems to work perfectly on my end. Again, my F-14s are Iranian, and the situation is a little different, but perhaps my info could be beneficial to you.