tameable pets disappear

domesticable animals (I don't know if all of them) I was able to prove that a wolf and a cat, if they are standing and have some obstacle to entering through a nether portal, they disappear, they will not be found in any dimension, I was able to prove it by putting a door in front of the nether portal. I don't know if the distance between the wolf and the nether portal varies, but if you place 2 doors at the entrance of the portal, open one and enter immediately, the wolf will not follow you to this dimension, but if you return, the wolf will not be there either.