My lovely horse disappeared

In minecraft 1.8.1 -1.8.9 i had a horse in my world... a tamed horse
After a 1.9 upd it disappeared from the world permanently
I used command /tp @e <x> <y> <z> to teleport all the entitys from my
world to a single coordinate, that horse (although being name tagged) haven't appeared.
I have a 1.8.9 backup save of this world, where the horse is in.
After entering that world horse dissapears instantly, (i was riding it, when i quit the world before 1.9 upd)
I suppose there is a bug, that vanishes that horse from the existance
I can send a savefile, if it's required
Help plz, i love the Bucephalus (horse's name)