My Tamed Horse Crashes the Game Randomly and when I reload minecraft, my horse is gone

I was riding through my town in survival mode with cheats off, then my game lagged out after I got off my horse and opened a chest nearby. When I reloaded Minecraft, I was standing on the other side of my town (around the middle of my trip) without my horse. I looked everywhere in the chucks surrounding me but I couldn't find my horse, Allie.

 

The screenshot was taken when I reloaded Minecraft