Disappearing ponies

I love this game! Its amazing, but the only problem that Im having is when I breed Shetland ponies, a grown pony comes out of the barn. Then my ipad glitches back to my main screen, and when I go back on the game, the grown pony, is invisible. So when I play him, my people look like their riding nothing. And I cant repaint them either, the grown ponies who were bred.

Eating chickens about Jumpy Horse, v3.9