Local LAN multiplayer game running on Windows 10 with Local server + 2 connected clients.
All 3 playsers were riding on a horse when the game crashed.
After restart the player acting as master was still riding the horse.
The 2 connected players lost the horses and where walking. The horses dissapeared from the world.
I just had this happen playing in a Realm, version 1.0.0. Random server crash, riding horse with saddle, everything else was there except horse & saddle after crash.