LOL!

I've seen it the other way around. I could see my clothes floating in the air above my mount but couldn't see my actual character. It was due to the memory leak issues with all AMD series GPUs and this game. I purchased an nVidia branded card and never saw this again.

Are you per chance running an AMD GPU of some sort? GPU doesn't matter in general. Anything from AMD will do this with this game due to driver issues.