I had an unpleasant experience in my world, two of my Allays (already renamed) disappeared out of nowhere while I switched from the overworld to the nether and they were some distance away. Luckily I had another one that I could duplicate and make more than one; this I experienced in 1.19 when I went to rescue them for the first time and this is repeated in the snapshot.

If you need the copy of the world just let me know.