Part that moves with the mouse unexpectedly flies towards screen?

local plr = game.Players.LocalPlayer

local mouse = plr:GetMouse()

local copy = game.ReplicatedFirst.GhostParts.Wall1Ghost:Clone()

copy.Parent = game.Workspace

  

mouse.Move:Connect(function()

local position = Vector2.new(mouse.X, mouse.Y)

local size = Vector2.new(mouse.ViewSizeX, mouse.ViewSizeY)

local normalizedposition = position / size

copy.Position = mouse.Hit.p

end)

the part moves with the mouse like its supposed to but something weird happens. when I move the mouse the part moves closer and closer to my screen until it goes through it. after that it flies back to were it was originally before. this is really annoying as the part just keeps moving towards me over and over.