The bug where it wont cause damage for no exlpainable reason is becoming really tiring. I just sneaked up to a reaver and placed c4 on it and then shot it. The guy flew away, I clicked the botton and saw a tiny midair explosion and he was fine... EDit: Argh, wrong forum part, my bad..
indeed, had it 4/5 times yesterday, i fly over a max dump the c4 on his head, fly off, trigger the c4.. nothing.. thinking they have flak and i missed the hitreg cross.. start shooting at them to find out theyre still at full health