I'm still having problems with tamed, enclosed horses disappearing on my bedrock edition/better with friends, realm. I had two different enclosures. One of them had my special horses that I use often, and the other enclosure had all of our extra horses.
I noticed that within a few days in real life, many of the "extra" horses disappeared, to which I figured some of my realm friends must've taken and left somewhere though no one would admit to it (though looking back at it now may have been them disappearing). Then all of the sudden today I get on and both of my good horses that had diamond armor for were both gone. I know no one would've taken them because we all have really good horses with most having diamond armor. Other members (btw there are 5 of us) are having the same problems at different times where our tamed horses are disappearing. I had already taken precautions for keeping them from suffocating in blocks by using fence and stone walls so I know they're not just dying.
I don't know what patch level this is at but its whatever the current "better with friends" version is on xbox one (three of us play on xbox one, one of us on ipad, and one of us on android).
Well that sounds like it would work but sadly I'm trying to leave cheats off so that I can get still get achievements.
They could fix this if they made all tamed animals and the chunk that they sit in was automatically a ticking area of 1x1 chunk. That would be nice. Not sure what their current fix did but it seems to still be a problem for me.