Getting dishorsed causes crash or sometimes a glitch which makes it impossible to continue.
The glitch causes you to look up in the sky as if you got dishorsed but the game still thinks you are on your horse.
If you ride away far enough like this to save the game then you will be permanently stuck inside your horse if you load it.
I just lost 2hrs+ to this cuz I forgot to save. (there was no risk so I saw no need to save… boy was I wrong)
I had something similar however i couldnt turn my characters head fast to the right to the left was fine.
IT instantly fixed itself by simply drawing my bow and aim left right up and down and i could look normal again but the inside my horse thing has not happend to me yet