On a multiplayer world on a Ipad that was fully updated, and minecraft was at 1.16.101, our pets kept disapearing including 3 horses, 1 pig, and a dog. Our world has a lot of bugs, so I expect more tamed pets to continue disapearing. Also, all the horses and the pig had saddles, and the horses were all attached to leads. The dog was breed by other tamed dogs.