Lerping is laggy when started to moving?

Hello.I made a lerping script for my game.But when I move It lerps it laggy.Any help would be good.

function renderLoop()--looped with a renderstepped() function.
local tablet = cam.Tablet

swayOffset = swayOffset:Lerp(cam.CFrame * CFrame.new(0,-1.2,-0.3),.2)--The CFrame is where the tablet is going to be in the camera.
tablet:SetPrimaryPartCFrame(swayOffset) 

end

Im also going to give the link of the place so you can test yourself.