Why Does This Script Sometimes Doesn't Work?

Help and Feedback Scripting Support
#1

Hello I was working on my project recently it’s a normal mini-car that moves by its self there is another script that controls blocked ways and turning parts

What is blocked ways?

Car stops while there is something in front of him

What are turning parts?

There are some invisible parts that the car will be tweened to those turning parts(like cars are turning to another way)

Here is the script :

local stopregion
local partsinregion
local tweenservice = game:GetService("TweenService")
local debounce = false

local info = TweenInfo.new(
	1,
	Enum.EasingStyle.Linear,
	Enum.EasingDirection.Out,
	0,
	false,
	0
)

local okparts = {
	script.Parent.CheckPart1,
	script.Parent.CheckPart2,
	game.Workspace.TunnelSpawn1.CheckPart1,
	game.Workspace.TunnelSpawn1.CheckPart2,
	game.Workspace.TunnelSpawn2.CheckPart1,
	game.Workspace.TunnelSpawn2.CheckPart2
}

while true do
	wait(0)
	stopregion = Region3.new(script.Parent.CheckPart1.Position, script.Parent.CheckPart2.Position)
	partsinregion = game.Workspace:FindPartsInRegion3WithIgnoreList(stopregion, okparts, 100)
	if #partsinregion >= 1 then
		for i,v in ipairs(partsinregion) do
			print(v.Name)
			if v.Name == "TurnPart1" or v.Name == "TurnPart2" then
				if debounce == false then
					table.insert(okparts, v)
					debounce = true
					local tween = tweenservice:Create(script.Parent.CarBodyPart, info, {CFrame = v.CFrame})
					tween:Play()
					tween.Completed:Connect(function()
						debounce = false
						table.remove(okparts, 7)
					end)
				end
			else
				if v.Name == "Tunnel1" or v.Name == "Tunnel2" or v.Name == "Tunnel3" or v.Name == "Tunnel4" or v.Name == "Tunnel5" or v.Name == "Tunnel6" then
					game.ReplicatedStorage.Happiness.Value = game.ReplicatedStorage.Happiness.Value + script.Parent.Happiness.Value
					script.Parent:Destroy()
				end
				script.Parent.MoveCarScript.Disabled = true
				script.Parent.CarBodyPart["idle car"].PlaybackSpeed = 1
				repeat
					wait(0)
					stopregion = Region3.new(script.Parent.CheckPart1.Position, script.Parent.CheckPart2.Position)
					partsinregion = game.Workspace:FindPartsInRegion3WithIgnoreList(stopregion, okparts, 100)
					for i,v in ipairs(stopregion) do
						if v.Name == "TurnPart1" or v.Name == "TurnPart2" then
							table.insert(okparts, v)
							wait(0.1)
							table.remove(okparts, 7)
						end
					end
					wait(0)
				until #partsinregion == 0
				script.Parent.MoveCarScript.Disabled = false
				script.Parent.CarBodyPart["idle car"].PlaybackSpeed = 1.5
			end
		end
	end
	wait(0)
end

But when a car gets brokes after it turns, that car that back of the car gets stuck forever until it despawn

Now what should I do?