[MC-54556] Mobs from named spawn eggs despawn

I originally wrote this as a comment on MC-54300, because I mistook it for the same issue.

Steps to reproduce: (only tested in singleplayer)

Name a spawn egg.
Spawn a mob with it.
Go to spectator mode.
The mob despawns.

Linked issues

is duplicated by 15

MC-56612 Ghasts despawn UPON entering spectator mode Resolved

MC-68975 Renamed Spawn Egg's Endermites despawn after 2 minutes Resolved

MC-70283 Renamed hostile mobs created by placing a renamed egg disappear if you leave the respective chunk Resolved

MC-122716 Mobs spawned with anvil-named spawn egg can despawn Resolved

MC-127734 Newer Hostile Mobs Despawning Even When Named Resolved

10 more links

relates to 1

MC-46776 When only a Spectator stays near mobs, they don't despawn Resolved

Attachments

Comments 22

user-f2760 2014-05-04T10:37:49Z

just a note, has to be a hostile mob

Itouch2 2014-05-04T10:49:40Z

Confirmed.

kumasasa 2014-05-04T19:34:23Z

Maybe related to the fix of MC-46776

Ethan Wanless 2014-05-12T07:07:11Z

Fixed in 14w19a.

kumasasa 2014-05-13T19:41:09Z

Cannot confirm fix, see screenshots.

12 more comments

Itouch2 2014-05-13T19:56:58Z

Still an issue for me in 14w19a.

kumasasa 2014-05-13T19:59:21Z

@@unknown: That was what I wanted so say...

Ethan Wanless 2014-05-13T22:13:56Z

I saw the screenshots. I performed a similar test and got different results. I named a creeper with a nametag in 14w19a and surrounded it by a bunch of other unnamed creepers. Then I went in to spectator mode, and the named creeper didn't despawn, but the unnamed ones did.

Ethan Wanless 2014-05-13T22:17:33Z

Now that I think about it, there is no name tag in your inventory. Did you name the spawn eggs and spawn one in instead of naming it with a name tag? If so, that could be the reason why we're getting different results.

Ethan Wanless 2014-05-13T23:11:01Z

I did a test and found that only mobs named with a name tag will remain after going into spectator mode. I'm guessing this is a bug, but I'm not sure if it's only supposed to be mobs with a name tag that don't despawn or if it's that any named mob is not supposed to despawn. Here's a link with screenshots of the test I did:

http://imgur.com/a/mgLKQ

kumasasa 2014-05-14T06:18:21Z

Can confirm that name tagged hostile mobs do not despawn.

Fenhl (Max Dominik Weber) 2014-05-14T06:24:09Z

Updated title and description accordingly.

kumasasa 2014-05-14T06:29:08Z

Spawner egg renamed mobs have the tag PersistenceRequired not set but name tagged mobs do.
Is that the bug here or is that behaviour intended ?

Itouch2 2014-05-24T17:01:59Z

Confirmed for 14w21b.

Dlawso the Really Lucky Rabbit 2014-05-26T12:22:23Z

This appears to also occur with naming mobs via commands, according to MC-55883

user-f2760 2014-05-26T14:18:08Z

Blah that's because they do the same, custom name doesn't prevent despawning presistance required does
setting presistance required to true prevents the spawning
name tag does set to true, spawn egg doesn't

kumasasa 2014-05-26T19:17:39Z

name tag doe set to true, spawn egg not

That way this ticket would be Working as Intended.

user-f2760 2014-05-26T20:17:51Z

Kumasasa it's the way is acts now, I don't know if it's intended and I didn't say it neither

kumasasa 2014-05-26T22:24:29Z

I didn't say it neither

That's true.

user-f2760 2014-07-22T18:17:15Z

is this still an issue in 14w29b, you have to test with multiple players because the spectator rule of despawning is now only when there are other non spectators online

corey manlen 2021-01-28T13:30:44Z

still a promblem 21w03

Luke W 2021-02-18T05:04:50Z

Just because the PersistenceRequired tag isn't being set doesn't mean it was intentionally made that way. They could have easily just forgotten to make it do that. This should be reopened until Mojang confirms whether it was actually intended or not.