[MC-124812] Endermen holding a block can despawn

The bug

Endermen which picked up a block can despawn.

Expected behavior

When endermen pick up a block their PersistenceRequired tag should be set to 1b.

Either the tag should then not be cleared anymore, or better there has to be a tag indicating that PersistenceRequired was set by the player and therefore should not be cleared once the enderman places the block again.

How to reproduce

Create a Superflat world.
Set the time to night.
```
/time set night
```

Summon an enderman holding a stone block.

/summon minecraft:enderman ~ ~ ~ {carriedBlockState:{Name:"minecraft:stone"}}

Teleport away and then back to make sure they could despawn
```
/teleport @s ~ ~ ~1000
/teleport @s ~ ~ ~-1000
```
→ ❌ The endermen holding blocks despawned as well

Linked issues

relates to 3

MCPE-181111 Enderman holding a block can despawn Open

MC-191725 Endermen picking up blocks don't count towards the mob cap, and don't despawn, potentially cluttering up the world with endermen if they cannot place the block down Reopened

MC-181111 Armor Bar Gets in the Way of Chat Resolved

Comments 7

Aaron Rhodes 2018-02-08T07:05:08Z

With the exception of TNT, are any of the items an enderman can pick up really that valuable? Once the player has access to those blocks they can be collected in abundance, meaning that losing a single one of those blocks to an enderman isn't anything game breaking. At the very least they shouldn't despawn when holding TNT.

Asteraoth 2018-08-18T14:51:46Z

Confirmed for 1.13.1-pre1

Edit: It would be better to use /summon minecraft:enderman ~ ~ ~ {carriedBlockState:{Name:"minecraft:stone"}

Asteraoth 2018-08-22T16:13:04Z

Confirmed for 1.13.1

muzikbike 2020-01-05T20:42:09Z

Affects 1.15.1, can I request ownership of this issue?

marcono1234 2020-01-05T22:51:39Z

@@unknown, sure you are now the reporter. Thanks!

Dmitry Konev 2020-05-13T09:39:45Z

Should be fixed. It can actually help in a search for endermen, I just wish they wouldn't teleport in caves and get stuck there forever

Tokes 2020-05-29T22:21:28Z

So now we have endermen slowly filling up our servers just so we don't lose our precious dirt blocks or flowers? Seems like a bad idea.