Zombie Damages even when their not touching me?

local Zombie = script.Parent
local Cooldown =  require(game:GetService("ServerScriptService").ZombieCooldownModule)
local wave -- for wave stuff
local debounce

while true do
	for _, child in ipairs(Zombie:GetChildren()) do
		if child:IsA("BasePart") then
			child.Touched:Connect(function(part)
				local partParent = part.Parent
				local humanoid = partParent:FindFirstChildWhichIsA("Humanoid")

				if not humanoid then 
					return
				else
				if humanoid and partParent.name ~= "Zombie" and Zombie.Humanoid.Health ~= 0 then
					if not Cooldown:Check(partParent) then
						humanoid.Health = humanoid.Health - 10
						
						local currenttime = os.time()
						Cooldown:Add(partParent,currenttime)
					end

				end	
				end
				
			end)		
		end
	end
	wait(1)
end
	

The above code is supposed to damage the player when the script parent touches the player. However, even after the player stops touching the script parent, it continues to damage.

I can't figure out the bug, and I'm almost certain that the bug occurs here.