Sometimes when playing the shuriken gun will shoot blanks. I know it's not actually just a delayed shot from lag but the glitch may come from random lag within the game. Also smoke bomb jumping seems to fix it.
it perhaps can be bullet lag. my gunner when i shoot doesnt hurt the enemy but then later the game i notice less lag and i can kill stuff again haha
True bullet lag happens during those types of games but that's not the case here. The gun simply shoots air until you die or smoke bomb jump or blah blah.