[MCPE-18657] mobs despawn or spawn at sea lanterns (while player is 20-30 blocks away) Created: 22/Nov/16  Updated: 25/Nov/20  Resolved: 05/Jun/18

Status: Resolved
Project: Minecraft (Bedrock codebase)
Component/s: None
Affects Version/s: 0.16.2
Fix Version/s: None

Type: Bug
Reporter: Jason Davies
Resolution: Cannot Reproduce Votes: 1
Labels: despawn, mob, spawn-chunk

Attachments: PNG File 2017-04-01 18.10.21.png     PNG File 2017-04-16 17.00.38.png     PNG File Creeper spawned in sea lantern.png     PNG File skeleton spawned in sea lantern.png     PNG File zombie spawned in sea lantern.png    
Game Mode: Survival
Confirmation Status: Unconfirmed
Platform: Tablet - iOS - iPad Pro

 Description   

This one keeps developing...

The summary as I understand now is that spawning and despawning is not working in chunks designated as Ocean monuments (after the blocks have been removed).

Currently I'm finding that mobs are spawning within sea lanterns during the day. I installed Soul sand under the lanterns which immobilises them. If I hit them with a sword, they still can't move but only then do they start burning in sunlight, still half in the sea lantern. If a bow with power is used, it moves them off the soul sand and they can walk around, burning.

I attech two new pictures of mobs who've just spawned).

So I am reporting mobs spawning randomly where they shouldn't, and also despawning as per originalreport below.

It must be the Ocean Monument!

Original report follows.

I am building a guardian farm and originally reported seeing guardians despawn. I've since seen a creeper also disappear at the same place. It seems to be that when a mob walks into a sea lantern and tries to climb it, it despawns (it could be prismarine brick, which is next to the sea lantern).

The pictures show one location where it happened with guardians swimming against the sea lantern but now I've removed the water, a creeper vanished in the same way in a different corner that is identical in components in my symmetrical structure.

I'll remove the lanterns and see if it persists, and update.



 Comments   
Comment by [Bot] Arisa [ 25/Nov/20 ]

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Comment by [Mojang] Mega_Spud (Jay Wells) [ 05/Jun/18 ]

Cleaning up old tickets: This ticket has not been updated recently (1 year+) so is being closed as Cannot Reproduce. If you feel this is still a valid issue then please comment, or create a new ticket following the Issue Guidelines.

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Comment by Jason Davies [ 21/Apr/17 ]

Still occurring in 1.06! They will spawn even if the block above is glass – ie there is theoretically no air.

Comment by Jason Davies [ 28/Mar/17 ]

Update. Still seems to happen in 1.0.5 (iOS)

Though they don't get trapped in the same way, I am still seeing mobs (mainly zombies) spawn in areas well-lit exclusively by sea lanterns (but with sunligth blocked) during daytime. This is with solid lines of sea-lanterns in passageways only four across.

But areas lit by sea-lanterns that are not continuous don't seem to have it happening. I've only seen it in continuous lines of them. Will keep exploring this (but just lost all the villagers in a large complex because of this argh)

Update: see attachment 2017-04-01 18.10.21.
They wander free, it seems, but spawn in the sea lanterns irrespective of light (note it is daytime and the skeleton should be burning)

[Said earlier -- I can't reproduce now. Have done a decent but not exhaustive testing.]

Comment by [MCPE Helper] Aspergerian [ 27/Mar/17 ]

Is this still an issue in 1.0.4.11?

Comment by Jason Davies [ 23/Nov/16 ]

Interesting addition: I'm pretty sure a creeper disappeared in one of the corners (with a sea lantern in it) in the picture so it's not just guardians (I've since removed the water). Will adjust description and title accordingly.

Comment by Jason Davies [ 22/Nov/16 ]

These show the distance and the kinds of spots they vanish in.

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