Pathfinding wants to go up first?

Hi I'm new to Pathfinding and I just learned about it in a video by TheDevKing. I followed his tutorial which did worked but I needed to create a few lines of code myself because he is using a character and I'm using a object. I used TweenService instead of MoveTo which would suit my problewm. It works now but there is a slight bug where when it starts it goes up then it comes back down and proceeds with the normal path. I have no idea why this is happening and cant find anything on it. Help. Thanks in advance!

Please keep in mind that it is not enclosed in anything and is a straight shot to the end point with nothing in its path.

Code:

local PathfindingService = game:GetService("PathfindingService")
local TweenService = game:GetService("TweenService")

local chase = script.Parent
local human = script.Parent:WaitForChild("Humanoid")


local tweeningInfo = TweenInfo.new(
    0.2,
    Enum.EasingStyle.Linear,
    Enum.EasingDirection.InOut
)

local path = PathfindingService:CreatePath()
path:ComputeAsync(chase.Position, game.Workspace.End.Position)
local waypoints = path:GetWaypoints()

wait(2)
for i, waypoint in pairs(waypoints) do
    local part = Instance.new("Part", game.Workspace)
    part.Shape = "Ball"
    part.Material = "Neon"
    part.Size = Vector3.new(0.6, 0.6, 0.6)
    part.Position = waypoint.Position + Vector3.new(0, 2, 0)
    part.Anchored = true
    part.CanCollide = false

    local position = waypoint.Position
    local tweenProperties = {Position = position + Vector3.new(0,5,0)}
    local tween = TweenService:Create(chase, tweeningInfo, tweenProperties)
    tween:Play()
    tween.Completed:Wait(2)
end