Smooth Elevator, issue with jittering and player phasing. Fixes?

So I know this code is disgusting to look at, but it made the elevator look smooth when it goes up and down, this also includes smooth door opening and closing. However when players go on it sometimes they teleport through it or the elevator jitters up/down. Any ideas on fixing this? (I am using the tweenservice for the movement of the elevator

local tweenService = game:GetService("TweenService")
local infoT = TweenInfo.new()

local f = false

local function teleportModel(model, CF)
	local CFrameValue = Instance.new("CFrameValue")
	CFrameValue.Value = model:GetPrimaryPartCFrame()

	CFrameValue:GetPropertyChangedSignal("Value"):Connect(function()
		model:SetPrimaryPartCFrame(CFrameValue.Value)
	end)
	
	local tween = tweenService:Create(CFrameValue, infoT, {Value = CF})
	tween:Play()
	
	tween.Completed:Connect(function()
		CFrameValue:Destroy()
		f = true
	end)
end

local info = TweenInfo.new(15, Enum.EasingStyle.Sine, Enum.EasingDirection.InOut)

local function tweenModel(model, CF)
	local CFrameValue = Instance.new("CFrameValue")
	CFrameValue.Value = model:GetPrimaryPartCFrame()

	CFrameValue:GetPropertyChangedSignal("Value"):Connect(function()
		model:SetPrimaryPartCFrame(CFrameValue.Value)
	end)
	
	local tween = tweenService:Create(CFrameValue, info, {Value = CF})
	tween:Play()
	
	tween.Completed:Connect(function()
		CFrameValue:Destroy()
		f = true
	end)
end

local config = script.Parent.Configuration
local lift = script.Parent.Lift
local topDoor = script.Parent.Doors.TopDoors
local botDoor = script.Parent.Doors.BottomDoors
local ts = game:GetService("TweenService")

-- Translation Info
local times = 130
local incO = 0.1
local speed = incO / 10
local drag = incO / times
local inc = 0 -- Ignore this

-- Main Elevator Info
local waitT = 10 -- Lift wait time
local startP = "bottom" -- Either "top" or "bottom"

if startP == "top" then
	inc = incO
	local lB = botDoor.LowerBottom
	local tB = botDoor.UpperBottom
	
	local lBz = topDoor.LowerBottom
	local tBz = topDoor.UpperBottom	
	
	teleportModel(script.Parent.Lift, script.Parent.targetT.CFrame)
	
	for i=0,times,1 do
		inc = inc - drag
		lB:TranslateBy(Vector3.new(0, inc, 0))
		tB:TranslateBy(Vector3.new(0, -inc, 0))
	end
	inc = incO
	for i=0,times,1 do
		inc = inc - drag
		lBz:TranslateBy(Vector3.new(0, -inc, 0))
		tBz:TranslateBy(Vector3.new(0, inc, 0))
	end
elseif startP == "bottom" then
	inc = incO
	local lB = topDoor.LowerTop
	local tB = topDoor.UpperTop
	
	local lBz = botDoor.LowerBottom
	local tBz = botDoor.UpperBottom		
	
	teleportModel(script.Parent.Lift, script.Parent.targetB.CFrame)	
	
	for i=0,times,1 do
		inc = inc - drag
		lB:TranslateBy(Vector3.new(0, inc, 0))
		tB:TranslateBy(Vector3.new(0, -inc, 0))
	end
	inc = incO
	for i=0,times,1 do
		inc = inc - drag
		lBz:TranslateBy(Vector3.new(0, -inc, 0))
		tBz:TranslateBy(Vector3.new(0, inc, 0))
	end
end

function openDoorb()
	inc = incO
	local lB = botDoor.LowerBottom
	local tB = botDoor.UpperBottom
	
	for i=0,times,1 do
		wait(speed)
		inc = inc - drag
		lB:TranslateBy(Vector3.new(0, -inc, 0))
		tB:TranslateBy(Vector3.new(0, inc, 0))
	end
end

function closeDoorb()
	inc = incO
	local lB = botDoor.LowerBottom
	local tB = botDoor.UpperBottom
	
	for i=0,times,1 do
		wait(speed)
		inc = inc - drag
		lB:TranslateBy(Vector3.new(0, inc, 0))
		tB:TranslateBy(Vector3.new(0, -inc, 0))
	end
end

function openDoort()
	inc = incO
	local lB = topDoor.LowerTop
	local tB = topDoor.UpperTop
	
	for i=0,times,1 do
		wait(speed)
		inc = inc - drag
		lB:TranslateBy(Vector3.new(0, -inc, 0))
		tB:TranslateBy(Vector3.new(0, inc, 0))
	end
end

function closeDoort()
	inc = incO
	local lB = topDoor.LowerTop
	local tB = topDoor.UpperTop
	
	for i=0,times,1 do
		wait(speed)
		inc = inc - drag
		lB:TranslateBy(Vector3.new(0, inc, 0))
		tB:TranslateBy(Vector3.new(0, -inc, 0))
	end
end

function liftU()
	f = false
	local t = tweenModel(script.Parent.Lift, script.Parent.targetT.CFrame)
	repeat
		wait()
	until f == true
end

function liftD()
	f = false
	tweenModel(script.Parent.Lift, script.Parent.targetB.CFrame)
	repeat
		wait()
	until f == true
end

while wait() do
	if startP == "bottom" then
		wait(waitT)
		closeDoorb()
		liftU()
		openDoort()
		wait(waitT)
		closeDoort()
		liftD()
		openDoorb()
	else
		wait(waitT)
		closeDoort()
		liftD()
		openDoorb()
		wait(waitT)
		closeDoorb()
		liftU()
		openDoort()
	end
end

Well, you could make the elevator itself not colliding and have separate parts with separate movements, and make these other parts invisible. The separate parts should likely be a simple hallow block. I also did not see a check for debounce anywhere, but I was just scanning. If you have the debounce and this problem is still happening, try the simple collision block with the other cosmetics of the elevator with no collisions. If even that does not work, just make the illusion of the elevator going up. What I mean is that you would have the player walkspeed and jumppower set to zero, teleport the player to the desired floor (teleport with Z coordinates only), and set the jumppower and walkspeed back to normal.