Most likely a bug, but I’ve seen a lot of nades just bouncing back from enemies from both sides.
I was thinking about making it a feature, but I can’t really decide if this would be a good or a bad thing. Instakilling is BS unless it is a headshot in any case (looking at you, shotguns) but this renders Nader with her grenade launcher out as harmless as a Fragger cooking - the enemies don’t take damage for another 2 seconds.
However, if direct hits are removed, both Fragger and Fletcher become even more superior, and players who can land direct hits don’t get rewarded, and use Fletcher instead.