Help with Attacking NPC

Help and Feedback Scripting Support
#1

I have a prolem of my NPC’s not attacking sometimes.
The NPC’s are supposed to attack when they play an animation.

Video:

ServerScript:

local character = script.Parent
local currentTarget = nil
local npcs = workspace:WaitForChild("Npcs") -- folder
local range = 100
local ProjectileTime = 1
local canShoot = true

local function castRay(target)
	if target.PrimaryPart ~= nil then
		local raycastParams = RaycastParams.new()
		raycastParams.FilterDescendantsInstances = {npcs}
		raycastParams.FilterType = Enum.RaycastFilterType.Whitelist
		raycastParams.IgnoreWater = true

		local rayOrigin = character.PrimaryPart.Position
		local rayDestination = target.PrimaryPart.Position
		local rayDirection = (rayDestination - rayOrigin)
		local raycastResult = workspace:Raycast(rayOrigin, rayDirection, raycastParams)

		if raycastResult then
			local distance = math.floor(raycastResult.Distance)
			if distance <= range then
				currentTarget = target
				return true, raycastResult.Position, distance
			else
				currentTarget = nil
				return false, nil, nil
			end
		else
			currentTarget = nil
		end
	else
		currentTarget = nil
	end
end

local function PredictNextPosition(targetPosition, targetVelocity)
	if targetPosition ~= nil and targetVelocity ~= nil then
		local t = ProjectileTime
		local endPosition = targetPosition + targetVelocity * t
		return endPosition
	end
end

local function findTarget()
	local checkRay, position, distance = nil, nil, nil

	for i,v in ipairs(npcs:GetChildren()) do
		if currentTarget == nil then
			checkRay, position, distance = castRay(v)
		else
			checkRay, position, distance = castRay(currentTarget)
		end

		if currentTarget ~= nil then
			local savedTarget = currentTarget

			local targetRoot = currentTarget.PrimaryPart
			local human = currentTarget:FindFirstChildWhichIsA("Humanoid")

			if human and human.Health <= 0 then
				currentTarget = nil
			end

			if distance ~= nil and distance > range then
				currentTarget = nil
			end

			if player and human and human.Health > 0 and currentTarget ~= nil and targetRoot ~= nil then
				local success, bool = pcall(function()
					return Remotes.CheckOnScreen:InvokeClient(player, targetRoot, {npcs})
				end)

				if success and bool == true then
					local characterRoot = character.PrimaryPart
					character:PivotTo(CFrame.lookAt(characterRoot.Position, position * Vector3.new(1, 0, 1) + position * Vector3.new(0, 1, 0)))

					if checkRay ~= nil and checkRay == true then
						if tick() - currentTime >= damageCooldown then
							currentTime = tick()
							playAnimation()
							checkRay, position, distance = castRay(savedTarget)
							local nextPosition = PredictNextPosition(position, targetRoot.AssemblyLinearVelocity)
							if checkRay ~= nil and checkRay == true and nextPosition ~= nil and canShoot == true and human and human.Health > 0 then
                                     print("shoot")
							end
						end
					end
				end
			end
		end
	end
end

RunService.Heartbeat:Connect(function()
	if character.PrimaryPart ~= nil and canAttack.Value == true then
		findTarget()
	end
end)