Put the summary of the bug you're having here

What I expected to happen was
1. I run out of memory and rejoin my single player world and my brown horse with diamond horse armor would still be there and I would be riding it.
2. I put a lead on my Horse.

What actually happened was
1. I had 2 brown horses with diamond horse armor.
2. The lead got taken out of my inventory before I could tie it to a fence and I couldn't tie it all.

Steps to Reproduce:
1. Get a brown horse with diamond horse armor (world specs were creative, cheat mode, bonus chests on, world spawns on, large biomes) and run out of memory while riding it, rejoin and there will be 2.
2. Put a lead on a brown horse with diamond horse armor. (WARNING VERY RARE!)