Horse problems

I have noticed a problem with the horses in the windows 10 beta edition. I have a survival world in which is a stable. I had two horses, one white and one brown. I noticed that the brown horse was unable to wear horse armor but the white one was. Also my white horse disappeared with the saddle and my golden horse armor and left a pig in its place. Later I got another horse(black this time) and it disappeared with the armor and saddle leaving behind another pig. A couple days later I came back to my house and the brown horse had turned white! I hope you guys can fix it.

-By the way, I love the new update you guys did! Awesome job!!!!!!!