I bought a realm for my friends and I a couple of days ago on minecraft, We were all convinced that someone was stealing our horses because of the items on them but after limiting access to my friends by only allowing them on when I'm on I realized that it was not the case, I had logged off to go to a appointment I had, removing all invitations to the realm before I left, once I got back I logged back on to find my horse missing which was named with a tag, had armor on, and a saddle. I ruled out immediately that it wasn't stolen and thats when it crossed my mind that it could be a bug and since I had never owned a realm before I had no idea.

3-5 Other horses and donkeys with the same circumstances as mine has also disappeared the past couple of days, the exception being that they weren't named but were tamed and had saddles and/or armor on. 

Please resolve this issue or let me know if there is anyway to further this from happening, Thank You!!