Invisible entities and teleporting llamas

Large quantities of invisible entity ghost areas that aren't fixed by reloading.

Seems to be only affecting the area the wandering trader llamas were in, and only after breeding them. I attempted to fix this by moving them to another area, but now on every reload some llamas have disappeared fom the new pen and are back in the old one. There are no new/duplicate llamas on reload, one or two of them just load in as having never been moved.