. the only thing I had with it is my AirPods charging case. Which I highly suspect is the reason as when I put them together the height matches . Yet it does not make sense since AirPods charging case is not like keys...
two phones scratched almost at the same area within such short period of time with essentially a rounded plastic object...
Go pick-up your AirPod charging case and run your hands around it. It is certainly not smooth. Feel those sharp edges at the back and front around the lid? .... exactly