I believe it’s just with the MK3 Helbore, but there’s a strange delay between shots that can occasionally drop the following shot from charging. From what I’ve tested it’s inconsistent and can mess up some shots while I’m in a match.
I love the power of the MK 3 but the “shooting input delay” (not sure what to call it) that can eat shots can be very annoying.
There’s also some weapon animations from sprinting or after attacking (small flourishes and blade twirling) mostly with the devil claw swords that can eat a weapon swap input too when I want to switch. My favorite loadout has been a MK 3 helbore and a MK 4 devil sword on my SS and I’ve been really feeling these issues.
Edit:
I also run the MK3 Helbore with the Onslaught blessing.