Salem

So I took a horse into a mine, game crashed, and because the horse occupied the space I was in i was forced to port back to my homestead losing everything in my invy, is this a bug? Because I have gone into a mine before on a horse and the game did not crash on me.

Well, the crash may have been something unrelated. Logging back in when something occupies the spot you were previously (e.g. by crashing from a horse or while lifting some big things) means you have to port back to your homestead (possibly losing items depending on the place).

In the case of horses, you can just wait a bit (they wander on their own, right?) for it to move away (or even for it to completely despawn).