Whats with the jump glitch?

I love the game and I always have, but recently, when I Saddle a horse it either kills it or hurts it badly and when I jump on the horse it sends me up into the sky and I have to restart my game so that I am back on the ground but the horse falls from the sky and gets killed. Is it a bug? Can you fix it please? Thank you!

MutantMayhem about Minecraft: Pocket Edition, v1.1.5