TankMasterTM

It did not take long. I was decorating my nether highway, so i was going back and forth frequently. It would take less than a half an hour before i noticed that one my allays were missing.

I am experiencing this as well. I have been using allays in building my nether highways, but starting with 1.21.60, I have lost them after teleporting back and forth. One, I left on a leash in my overworld but when I came back, it, the leash, and the item it was holding were gone.