Lenz passive Ammo Mutation is being as useful as Conclave

[(XBOX)HollowCube987]

I don't know if it was always a thing, but the Innate Arrow Mutation doesn't work properly on my favorite bow, the Lenz. I understand 110% that having the normal 72 arrows would be too overpowered, and that having no ammo mutation at all would make it too underpowered, but it doesn't seem to work for most ammo boxes I pick up.

For example, picking up a container of Rifle ammo would show the little icon for mutated ammunition, but wouldn't show a number, or give me any arrows. The same thing applies for a container of pistol ammo. It only shows a "1" when picking up a box of shotgun ammo, which makes me feel like I'm starving for ammo unless I get Sniper ammo.

The Warframe Wiki says that 1 box of ammo is worth 1 arrow for the Lenz, but I have to pick up what feels like 10 boxes of rifle or pistol ammo just to get back one shot. Digital Extremes, please make the Lenz gain one arrow per one box of ammo that isn't sniper ammo or heavy ammo.