I’ve noticed, several times, that when I fire my grenade launcher, if the grenade lands ON an enemy (rather than beside them) it won’t explode. It fires, lands, and that’s it. In the timeless words of Marvin the Martian, “Where is my kaboom?”
have you used the F12 bug reporter to report it?
I have not. The first couple times, I didn’t know about it. The most recent time, I was busy getting stomped by a scylla and didn’t think of it.