Usually when ghost is pulled out, weapon becomes stowed and stowing resets Killing Tally stacks.
This is especially annoying during campaign when you pull out ghost to view current task in the mission.
Moreover, Killing Tally does NOT reset when you are in the dark place. This is because in dark places ghost turns on flashlight and "pulling ghost out" does not stow weapon.
I would like Killing Tally not reset when Ghost is pulled out at any time. Such behavior is already implemented on Ace of Spades and Memento Mori.