While flying in jets post-patch I noticed that ECM jammer became very inconsistent, even when using it the same way as before the patch. I usually deploy ECM as soon as I hear the lock-on sound. Pre-patch it'd instantly break missile lock, but post-patch they keep locking on and fire anyway.
Watch 4:43-4:53 of this video:
It's exactly like that, but usually I get hit by the missile.
Have they changed anything about it, or am I just doing it wrong?