Why does aim script phase in and out of changing the FOV?

Hi! I made an aim script for a raycast gun and for some unknown reason it randomly will phase in and out of aiming and sometimes not aim at all on certain guns. Some tools work, some don't.

Here is the localscript that handles all of it. (Mousebutton2 Up/Down and the while true are the important ones)

local aiming = false
local cc = game.Workspace.CurrentCamera
function Equip(mouse)
	local Player = game.Players.LocalPlayer
	local AmmoGui = script.Parent.AmmoGUI:Clone()
	idleAnim = script.Parent.Parent.Humanoid:LoadAnimation(script.Parent.Idle)
	fireAnim = script.Parent.Parent.Humanoid:LoadAnimation(script.Parent.Fire)
	AmmoGui.Parent = Player.PlayerGui
	AmmoGui.TextLabel1.LocalScript.Disabled = false
	AmmoGui.TextLabel2.LocalScript.Disabled = false
	mouse.Icon = "rbxasset://textures/GunCursor.png"
	idleAnim:Play()
	mouse.Button1Down:connect(function()
		print("Mouse pressed client!")
		if script.Parent.Ammo.Value > 0 and script.Parent.IsReloading.Value == false and script.Parent.IsFiring.Value == false then

			script.Parent.RemoteEvent:FireServer(mouse.Hit)
			fireAnim:Play()
		end
	end)
	
	mouse.Button2Down:connect(function()
		print("Mouse pressed client!")
		
--		if (cc.focus.p - cc.CoordinateFrame.p).magnitude <= 1 then
--
--			print("First person")
--			repeat
--			cc.FieldOfView = 20
--			wait(0.33)
--			until (cc.focus.p - cc.CoordinateFrame.p).magnitude > 1 or aiming == false
--		end
		aiming = true
		
	end)
	mouse.Button2Up:connect(function()
		print("Mouse pressed client!")
		aiming = false
		
	end)
	
	
end
function UnEquip(mouse)
	wait(0.5)
	local Player = game.Players.LocalPlayer
	Player.PlayerGui.AmmoGUI:Destroy()
	local cc = game.Workspace.CurrentCamera
	cc.FieldOfView = 80
	aiming = false
	idleAnim:Stop()
	fireAnim:Stop()
	
end
script.Parent.Unequipped:Connect(UnEquip)
script.Parent.Equipped:Connect(Equip)
while true do
	wait(0.33)
	if (cc.focus.p - cc.CoordinateFrame.p).magnitude <= 1 then
--
		if aiming == true then
			
			cc.FieldOfView = 20
			
		else
			cc.FieldOfView = 80
		end
	else
		cc.FieldOfView = 80
	end
end