So world anchors are saving position and rotation. Is there any particular reason why they dont save scale? Would be awesome if they save the whole transform 
Scale needs to be constantly changed based on the position of the device minus the position of the object so that it retains the same perspective. At least that is my assumption.
Unfortunately nope^^ I dont see any reason why this isnt saved as well 
Maybe because WorldAnchors are only for positioning. But hey why not just save the whole transform. Currently im saving the scale with playerprefs which is kind of inconvenient.