[MC-10] Mobs temporarily glitch out of fenced areas / into blocks

this seems to happen when you have a lot of them in the same fenced of area. this applies to both fences and stone walls

To reproduce:
1. Create an enclosed area
2. Fill it with a lot of mobs, up until the point they keep pushing each other
optional. hold an item that makes mobs follow you and it will be more visible
3. mobs should float outside fence/block, then teleport back in when you get close.

Linked issues

is duplicated by 35

MC-18 Livestock jumping through 1-high fences Resolved

MC-210 Animals Are glitching through doors! Resolved

MC-959 Baby Sheep sneak through fences Resolved

MC-976 Animals teleporting out of a fenced area Resolved

MC-1029 Animals going into blocks Resolved

30 more links

relates to 2

MC-2025 Mobs going out of fenced areas/suffocate in blocks when loading chunks Resolved

MC-73302 Block collision box issues (mobs glitch through blocks and more) Resolved

Attachments

zombie snapped back behind fence right after this was taken.jpg

Comments 46

Mustek 2012-10-24T14:31:47Z

I can confirm this.

To reproduce:
1. Create fenced off area
2. Fill it with a lot of cows, up until the point they keep pushing eachother to make stand
3. Cows should float outside fence, then rubberband back in.

Ezekiel 2012-10-24T15:29:16Z

This behavior is because the client tries to guess the action of the mob. For some reason it guesses incorrectly.

ES 2012-10-27T14:05:09Z

This is also true for sheep, and perhaps for pigs too. I had noticed this bugs initially with fence gates just after the first official release of Minecraft and reported it on getsatisfaction, but I never knew if the report was ever reported to the Mojang team.

ES 2012-10-28T00:35:05Z

New stuff : this bug also concerns cobblestone walls.

TnT (Trinitro Toluene) 2012-11-10T23:09:28Z

Is this still a concern on Minecraft 1.4.4 Pre-Release? If so, please update the version affected.

36 more comments

Ryan Barrett 2012-11-11T06:03:25Z

im not shure if it is or not, i havent had a chance to play the new prerelease

ES 2012-11-11T13:07:31Z

Yes, this bug still exists in Minecraft 1.4.4 pre-release. Please fix it, it's ruining animal breeding...

MisterSanderson 2012-11-17T16:40:28Z

Not only cows, chicks too.

Tom Mate 2012-11-21T02:27:18Z

I can't confirm this with cows. But chickens and pigs escape all the time from my fenced areas. Makes me really sad 😞

Matthew Sladen 2013-01-10T17:47:31Z

Why does this say resolved when it is not?

A Full Name 2013-01-13T06:19:30Z

It think it says "resolved" because they fixed it in a development snapshot version. But that really doesn't count if you ask me.

Dranitsin Roman 2013-03-05T09:12:29Z

It is not resolved, still happens in 13w10a =(
My chickens still stucks in fence and teleports over it...

Ryan Barrett 2013-03-05T20:39:43Z

i have cloned this so it shows that it is unresolved MC-11086

WHOOPS 2013-03-13T06:08:31Z

I think this is a crowding glitch because you normally cant spawn 2 mobs on 1 block and so the mobs look like there going throught the fence and then get drawedback to the barn (i thinks its a game logic clash)

Tails 2013-03-14T00:53:09Z

Reopened.

Dranitsin Roman 2013-03-15T12:09:10Z

13w11a, still happens...

Jadon Mayhew 2013-03-18T00:20:33Z

Yep, this is very annoying. Happened to me with glass panes, they glitched so far out of the fenced area through my window and chilled in my house until they 'teleport' back.

Brandon Enright 2013-03-20T00:05:54Z

Glitching out and teleporting backe is not the issue. That's a purely client-side problem.

The issue is that mobs can actually escape fences permanently. I've never seen it happen while all of fenced area chunks are loaded and nearby. I think the issue of mobs escaping only happens when chunks containing portions of the fence are unloaded and then reloaded. Most likely animals pushed up against the fence when the chunk is unloaded will either load on the other side of the fence when the chunk is reloaded or, perhaps breaks in the fence due to unloaded chunks allow animals to walk out.

Ryan Barrett 2013-03-20T02:37:57Z

brandon the second part of what you said is true, however that is a different bug then what i reported. whether it is a client side problem or not doesn't change the fact that it is a bug.

Brandon Enright 2013-03-20T06:15:08Z

Ryan, yes, I see this bug is specifically about the mobs appearing to come out of the fence only to zip back in later. Mobs escaping permanently is a different issue. Any idea what the bug ID for that one is?

Ryan Barrett 2013-03-20T11:15:58Z

no, i dont know what the id is.

Alex H 2013-05-09T21:19:42Z

https://mojang.atlassian.net/browse/MC-2025

_zombiehunter 2013-06-16T17:02:30Z

Just had exactly this issue in 13w24b. Would someone be so kind and update the "Affects Versions" tag?
Thx.

Daniel King 2013-07-18T20:02:19Z

Just so everyone know, this bug is mostly or entirely fixed as an unintentional side effect of my MC-2025 bugfix.
Any questions, comments or concerns about the fix should be posted in the comments section of the link:

MC-2025 Bugfix+ 1.6.2 v23

_zombiehunter 2013-10-14T14:24:00Z

This bug should definitely be marked as "related to MC-2025" ...

Nixinova 2013-11-26T19:04:59Z

congrats on the name 🙂

galaxy_2alex 2014-02-14T15:09:22Z

Bug is worse in 14w07a.

Martijn de Groot 2014-02-22T13:34:13Z

They also glitch trough transparent block (don't know about solid blocks) for me.
Example: I have a chicken farm where Ihave about 40 chicken locked up in a 1x1x2 area in my world and when I opened the world in one of the latest snapshots they were all spread around the farm.

Brad Corbin 2014-04-17T19:23:36Z

This glitch is back in a big way in release 1.7.8 and 1.7.9. It is annoying for animals, but deadly and game-breaking when it happens to hostile mobs!!

I have a Skyblock world with several animal pens and a mob farm. Every time I log in using 1.7.8 or 1.7.9, I have animals out of their fences and hostile mobs running all over the place, when they were safely contained upon logout.

Please fix! Especially for hostile mobs!

Jeuv 2014-07-09T19:53:00Z

Also in 1.7.10

Andrew Thomas 2014-09-05T04:40:02Z

Confirmed for 1.8

Sen Choi 2015-02-17T15:51:28Z

confirmed for 1.8.1

Mitch Belcher 2015-02-17T16:04:13Z

Confirmed for 1.8.1 using Windows 8.1 OS with the latest version of Java. This is a persisting issue.

bob 2015-10-24T22:31:28Z

Does this still happpen in the 1.9 snapshots?

Swekob 2015-11-11T17:06:26Z

Fixed for me. Probably due to MC-2025 being fixed. (15w45a)

[Mod] redstonehelper 2015-11-11T17:07:30Z

Probably fixed somewhere between 1.8.1 and 15w45a.

JON 2016-02-29T20:25:53Z

Occurs frequently on Xbox 360 regarding keeping large amounts of zombies enclosed in a brick enclosure in a village.

Dragorn421 2016-02-29T21:03:41Z

I updated my server's version to 1.9 from 1.8.9. Immediately after I log on two zombies are attacking me: they came from the hundred zombies that were still in my xp farm collection thing when I stopped the server to update it, so they escaped their cell somehow. I still have a save of the 1.8.9 world if you need it (500mo though), but this seems quite random and not easy to reproduce.
Here is what their 'cell' looks like: http://puu.sh/nq6wD/325b690631.png
They stand on a slab and there is a 1.5 blocks gap (no baby zombies can reach this point).
Sadly I don't feel like this is fixed, or it's a different issue. I didn't notice anything weird in logs (3 entities, not zombies, seemed to have duplicated UUIDs).

MC_Master06 2016-03-02T03:04:39Z

LOL Not fixed in 1.9

Dragorn421 2016-03-02T11:45:16Z

Confirmed in 1.9 release, I found a sheep stuck in a cobblestone wall.
It was one of the red sheeps that was stuck in the wall i'm looking at in this screenshot http://puu.sh/ns0NT/975ba2cd06.png (i'm facing negative x y and z). It happened on a 1.9 vanilla server which "java -version" is:
java version "1.7.0_95"
OpenJDK Runtime Environment (IcedTea 2.6.4) (7u95-2.6.4-1~deb7u1)
OpenJDK 64-Bit Server VM (build 24.95-b01, mixed mode)

I don't know if this happens because of chunk unloading and loading or just if the world stays loaded quite some time.

Dragorn421 2016-03-04T22:11:37Z

Definitely confirmed for 1.9. I got similar issues to previous ones multiple times.

[Mod] redstonehelper 2016-03-05T19:47:33Z

@@unknown: You're looking for MC-2025.

sjx 2016-03-06T00:03:57Z

Still in 1.9

[Mod] redstonehelper 2016-03-06T21:10:14Z

Video, please.

Boyucus Builder 2016-03-31T17:49:13Z

Yeah, this glitch has been fixed. Now, instead of teleporting back, they just get pushed through completely. Also, it still happens with doors.

bob 2016-04-01T13:56:36Z

I can confirm that my animals are glitching out of the or fenced area, I'm guessing on chunk reload.