eldar macros should lose their homing when their target gains stealth
but they do not
even a stealthed necron jumping behind causes the macros to do a 180 turn and still hit
also tested on marine escorts with emission dissipators, a escort running silent and boosting to the side after macros where fired still got hit, the missile/macros doing a 90degree turn to follow the target

if i understand correctly they should lose homing when a target is no longer detected
they do not