Pokey

I can't reproduce this.

@smaugthegreat108 Minecraft 1.8 change how minecraft generates chunks, so all worlds behind that if upgraded will change biomes and generate ugly borders. Your comment has nothing to do with this bug.

Now im able to reproduce this bug.

3 Years playing on my world, 1 month following this bug and scared, and yes, it happened to me now, 3 of my villagers just dissapear, non of them were at the chunk border, no zombies near and they had roof. All librarians with different levels. 1.15.2 vanilla.

Because is resolved. If you upgraded your world to a snapshot without a backup, then is your responsibility. Just clarifying, is resolved because if you upgrade a 1.15.2 world to the snapshot fix or newer, everything works as normal.

I tested this yesterday with my world (1.15.2, its was a backup) and everything worked fine (guardians, pillagers, nether fortress and witch huts), i have images of that, should i upload it?

Andy Huang, Elder Guardians dont "spawn" like guardians, they are created with the Ocean monument, like witches or shulkers, that has nothing to do with this.

The first reason they should spawn inside of wither roses is because they dont get dmg, just like other mobs spawning inside of other type of flower (like poppys), so why they shouldnt?
And second reason is like pigmans, they can spawn on top of magma blocks, because they are fire resistant, just like the wither skeleton is immune to the wither effect, so he should be able to spawn inside of it.
 

1. Not only having a wither rose farm is quite difficult, but a spawnproof area of 8 chunks on every direction is a high level work, I digged/tnt out a whole 21x21 chunks area, breaking this kind of thinks that only crazy or high level players do is rly annoying and sad. Hope this get fixed, if not I'll be completely out of this version (redstone and wither out, this is not for me).

2. Keep up the good work Mojang and I hope all of the people reading this are okay on this hard times ^^

I tried, i lost.

You actually cant remap your keyboard with Logitech Software, you will need a third person software to do that...

So now im literally not playing my world in 1.14.4, is horrible (at least for me) to play with other configuration.