Great Game! But one problem

Ive had this game for years! And I love it. I recently updated the game and I made a new survival world. I decided to take a horse and found a saddle. I wanted to take it out but when I push ride and go on the horse or donkey it dies. I tried taming another horse and try again and this time I died and it said that I fell from a high place and the horse had a few hearts left. I made sure I wasnt by anything when I try to ride the horse. Please fix this glitch, please and thank you!

ChickenNumNum about Minecraft: Pocket Edition, v1.1.3