Normal behaviour. Everything is based off a 1.0 model scale which is the human phenotype. Any other race is going to center to those co-ordinates until it has a chance to run it's own animation script which only happen at which time you either exit your conversation or cancel all interaction with the object.
Nothing I'm aware of that you can do about it. If you want to see real fun see what a robe does when you change your phenotype entirely.
'>