Disappearance of mobs and armor stand that should not despawn

I exaggerated the distance and time, but this phenomenon also occurs when the distance is much closer and the elapsed time is a few tens of minutes.
(In such cases, the number of mobs that disappear is also small.)
No game crashes or network disconnections occurred during this time.

I have noticed this as well. Secondly, my named horses and a donkey attached with a lead also despawned out of nowhere. I can still the lead “animation”, or whatever you call it, on the fence, but when I right-click on it, the lead doesn’t pop out. Please fix your despawning issues. It is annoying and a waste of time. I had a diamond armor and a saddle on that horse, and a saddle on the donkey. Now, I have lost two saddles, which you cannot even make in-game.

I get the same issue. At least six villages in my world have completely despawned that way, In one of them there were villagers that I had secured in their houses and they still disappeared. So far it’s been an all or nothing for me, either the village is fully populated or mob disappears (villagers & golem).

I also had one named and one unnamed wolf that were sitting in a secure location that disappeared. It is a very annoying issue.

Hi and thank you for your report!

However to further investigate the bug we will need a world on which that happens.

Is this only or specifically happening to villages? Do any other mobs or structures are impacted by this? (e.g. woodland mansions or pillager outposts?)

This ticket will automatically reopen after you reply.

It's not just in villages.
It can happen to everything from livestock on farms to pet animals in houses to installed armor stands.

In the case of self-made bases, it often happens that a player goes off on an adventure far away and when he returns, some of the mobs have disappeared.
In the meantime, the spawn point is not fixed, as the beds are carried, set up, retrieved, and spent the night over and over again.

I don't know about the woodland mansions, but at one pillager outposts that was put off due to lack of preparation, the allay that was supposed to be in the jail was gone when I revisited it.

My own sense is that mobs and entities far from the player character or spawn point disappear at a higher rate and on a larger scale the longer the interval between visits.

This phenomenon happens routinely when playing Minecraft on the "Switch", regardless of play style or world.

Just to keep this alive and provide more updates. I just have all my bees disappear after I returned from an exploration expedition.
I have a few beehives at my homebase, all had around one to three bees per beehives.
When I returned I no longer had any bees at all.

When this happened to me it wasn’t just animals but all of the entities. My armor stands disappeared, (with the armor on it) along with all of my paintings, which is how I first noticed, minecarts, and an item frame. But the main reason I want it fixed is the all of the villagers and dogs.

When this happened to me the armor stands slowly dropped down through solid blocks. I found them on different floors of my base, always a lower floor, and sometimes half way through the ceiling. I even found an armor stand plus a full set of armor 3 months later buried about 20 blocks under my base.

I think what I just experienced falls under this bug. I had three sheep on leads tied to a fence and two of them just disappeared along with the lead. I also had an arctic fox on a lead that disappeared at the same time. Then yesterday I brought three skeleton horses back to my base and tied them to a fence and at some point today one of them is gone.

This happened on 1.21.124

Update…the mobs disappeared after the 1.21.122 hotfix.