After driving a service from Paddington to West Ealing, I walked back to Ealing Broadway and boarded a train there. I sat down in 1st Class across this lady: When I looked at the train from the outside (using the '3' button), I saw that the seat across the lady was empty: After walking to the cab and sitting down in the second man's seat, I could see my avatar in the outside view: It would be nice if I could also see myself sitting in the passenger compartment.
I've gotten this too and so have a couple of my friends too. Edit: I'm not sure if this is related, but look at the compass while sitting in passenger mode.