It's easy to reproduce, just now in kagoshima i planted a c8 on a hollanders cockpit and the hollander killed me but from my place of death i could see the c8 and when it blew up the explosion was near my camera where i died not on the hollanders cockpit.
you think its lag? I could easily plant c8 on moving mechs in European servers with a ping of 200+ before this patch.
My ping was almost always 95-98 when this happens.
To me it looks like c8 works like a PPC now, there is the special fx that we see flying through the air and an impact followed by a small explosion and then the actual projectile that causes the damage that we don't see.
You can see this when you have a shitty ping or the server is over loaded i.e. "my ac 20 arent registering".
Maybe my game is fapped and I'm the only one who gets this or maybe I'm the only one who puts my BA in the path of moving mechs using my jets and throws a perfectly timed C8 so it lands smack dab in the center of a mech thats running full throttle.