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.

I second what @json2828 says.
I travel a lot to spaces that are 1000+ block distant. On my first visit everything seems fine, but when I go back a second or third time after travelling a lot, when I come back my villagers have all disappeared (even those that have been protected).
I also happened to some of my wolves (named and unnamed) when I returned back at my home base after such a trip. As mentioned in the previous, I travel with a bed that I use frequently during my travel.

it is more apparent with villagers, since all villagers in a village disappear at once, but I’m pretty sure it can happen with any mob.

I don’t think this happens for aggressive mobs that spawn in certain areas like woodland mansions and pillagers outpost, but it would be hard to tell since these structure create spawn areas, so even if the pillagers despawned, new ones would spawn back, which is not something that happens with villagers or domesticated wolves. Once they are lost, they stay lost.

I can also confirm that this isn’t something that seems related to a specific world. if you look to all the other bug report that have been closed as duplicates to this one, you can see that it just seems to be something that happens every so often when players explore far away and come back.

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.