How to make entity lerping smoother?

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#1

So I have a rooms game, and I make it so the entities lerp from start to finish. Usually it’s choppy, and the hitbox overshoots players. How can I fix this?

local RunService = game:GetService("RunService")
local part = script.Parent.MainPart

local alpha = 0
local speed = 50
local startCFrame = script.Parent.PrimaryPart.CFrame

RunService.Heartbeat:Connect(function(delta)
	if script.Parent.Temp.Value == false then
		local lastRoom = game.Workspace.Rooms[game.ReplicatedStorage.CurrentRoom.Value].Exit
		local distance = (script.Parent.PrimaryPart.Position - lastRoom.Position).Magnitude
		local relativeSpeed = distance / speed
		local goalCFrame = startCFrame:Lerp(lastRoom.CFrame, alpha)
		script.Parent:PivotTo(goalCFrame)
		alpha += delta / relativeSpeed
		if script.Parent.MainPart.Position.X < lastRoom.Position.X then
			script.Parent:PivotTo(lastRoom.CFrame)
			script.Parent:Destroy()
		end
	end
end)
#2
#3