First and foremost, let me say beforehand I can't provide a video. Now, onward to the bug problem... When killing enemies with this glaive (or any glaive that can roll pugilist) neither regular melee kills nor bullet kills provide melee energy for the characters melee. Now, I don't know how you folks at Bungie coded this, but I assume the perk somehow determines the (constantly charged) "glaive melee" ability slot as the slot it should refill with energy. But since said melee never depletes any charge on usage, it doesn't refill energy at all. Edit: I was able to verify this, because when you shoot with the glaive and switch fast enough to another weapon, it does grant the player's melee energy on kill. Maybe this is intentional, maybe it is not. But it seems you devs forgot to program some sort of "bypass" that ignores the glaive melee slot and refills instead the players melee slot when using a glaive with pugilist.