This bug is in iOS 1.2.14.

I noticed That when I walked away from my tamed horses, they disappeared, and then seconds later reappeared. It also happened with my tamed dogs and chickens. And I searched.

I walked away a couple of blocks, and they disappeared, came back and they reappeared. When I came back from adventuring, my chickens were gone, then a few seconds later, reappeared. Very weird. 🤔

May not be a problem any more.