Multiplayer Sometimes Starts With Me Spectating Another Player?

I’m pretty sure I know how multiplayer works, I’ve certainly connected to several lobbies and raced a few times. However, sometimes when a race starts I somehow end up spectating a cockpit view of another racer (a pretty low res version at that)
I get the countdown and everything as normal but just as the race is about to start and I’m expecting to be in my car I’m in someone elses. I still have control of my car as I can see it in the rear view mirror of the car I’m sat in!!

I definitely haven’t entered spectate mode myself, I know that.