Horses Despawning

I know you think you've resolved this issue but I can assure you that you are nowhere close. I have had three horses despawn now and it didn't matter if they had nametags, leads, armor, saddles, or a mix of the above, they simply disappear when I load into the game. Please fix this. I have already lost multiple pairs of armor, including some diamond horse armor, and saddles. This is incredibly frustrating.