[MC-142817] Villagers and mobs try to pathfind through corners

The bug

Mobs try to pathfind through corners, if there is an air block behind the corner. This seems to affect all mobs, including passive mobs such as villagers.

To reproduce

Build a diagonal wall that mobs could theoretically walk around
Behind that wall, build a pillar
Climb on that pillar
Switch to Survival mode
Spawn a zombie on the other side of the wall

Video

[media]

Original description

Sorry, I am creating this bug again because MC-142516 was resolved as a duplicate of a non-related bug.

"Zombies, Creepers, Skeletons are all behaving like they have no AI for pathfinding at all. In bamboo forests or inside mineshafts they are unable to get around a corner (or double corner), just to reach me. Instead they are searching for the shortest direct path and get stuck."

All mobs are generally moving and are following me. They have also seen me, I usually hit them first and run just 5 blocks away. All the mobs in the picture have seen me, followed, but then stayed where you can see them. They just have no clue how to get around.

Linked issues

is duplicated by 25

MC-10836 In ocean biomes there are random air pockets in the water. They vary in size. Resolved

MC-145129 NPCs get stuck between blocks and fences Resolved

MC-147556 house design gets villagers killed Resolved

MC-147899 Villagers have difficulty pathfinding to bed or workstations Resolved

MC-148111 Villager getting stuck on diagonal structures Resolved

20 more links

relates to 3

MC-160582 Villagers sometimes try to pathfind through a wall when heading to work or to their bed Open

MC-110390 Villager AI has problems with non cubic/not straight houses Resolved

MC-142964 Pathfinding ranges are not consistent/too small for Villager-hunting mobs Resolved

Attachments

Minecraft 1.14 Pre-Release 1 4_10_2019 9_19_26 PM_Trim_Trim.mp4

Minecraft 19w12b 2019-03-23 14_11_49_Trim.mp4

Comments 29

Third Eye 2019-01-23T11:54:16Z

I added some more pictures of mobs not following anymore if they reach bamboo.

Jacob Andrew Jagiella 2019-02-04T23:28:44Z

If I remember correctly, this is a feature of the AI appearing when it's not supposed to. Ordinarily, when the AI cannot create a path from the monster to its target, it will attempt to simply get as close as possible without entering a hazard. However, in these cases, the monster clearly has a very short path to follow but is prevented from following the path. This definitely relates to my MC-142964, except manifesting in a comically more severe way. In fact let me test this...

Well, part of your error is something more obvious - mobs path through Bamboo like they would tall grass; they ignore it entirely.

[Mod] violine1101 2019-03-23T13:24:37Z

Confirmed in 19w12b. I edited the ticket a bit (I hope you're fine with that, OP) and attached a video showcasing this bug.

[Mod] violine1101 2019-03-24T12:20:21Z

This behaviour can also be observed with villagers in snowy tundra villages. They try to get in and out of their igloos by going through their corners.

ZeNico13 2019-03-27T20:05:07Z

Still in 19w13a

19 more comments

Carlos G. 2019-03-29T03:30:45Z

This happens very, very frequently in Savanna Villages, since most the Houses are based with no Corners Villagers gets stuck there trying to reach their Beds even if the Door is close to them.

ZeNico13 2019-04-03T19:02:59Z

Still in 19w14a

ZeNico13 2019-04-10T19:38:59Z

Still in 19w14b and 1.14 Pre-Release 1

ZeNico13 2019-04-12T19:47:19Z

Still in 1.14 Pre-Release 2

Angelus P 2019-04-14T02:48:43Z

Added images of Savanna villagers when they walk around corners and they begin to jump up and down. They eventually stop but some have stayed out at night not able to reach their beds.

Tammy Sanders 2019-04-17T21:05:24Z

Villagers leave their village never to return. I watched a villager wander off from a taiga village; I followed him for 400 blocks as he walked purposefully away from everyone and everything he knew. Last I saw him he was headed for a bamboo forest

------------

My comment was marked resolved as a duplicate of this ticket, but I don't see any comments relating specifically to my issue so I am copying my comment from the other ticket to here.

[Mod] violine1101 2019-04-18T10:39:54Z

The issue you're describing is entirely unrelated to this ticket. Please create a new report.

ZeNico13 2019-04-19T09:37:26Z

Still in 1.14 pre-3, 1.14 pre-4 and 1.14 pre-5

ZeNico13 2019-04-23T19:07:37Z

Still in 1.14 Release

Lulu Lambert 2019-04-23T19:24:01Z

Yes, the problem still prevails in the latest 1.14 release:

[media]

GolfinhoVoador 2019-04-25T00:15:16Z

I wanna know why this is not still resolved, 29 votes + 4 votes on MC-147905 + 5 votes on MC-101424 + 4 votes on MC-110390 + many others!

Edit: I know its not high priority, but its still a bug that as all other bugs shall be squashed.
Imagine a new player on a wooden home hidden on a corner of his house...
And them his entire house explodes and he dies, not understanding anything that happened he questions to himself: "why did my house explode"

Jacob Andrew Jagiella 2019-04-25T15:33:56Z

Confirmed (esp. for cats + villagers) in 1.14 official. They also try to jump onto 1.5 block high structures, like block+slab fences

Carlos G. 2019-05-03T04:35:31Z

Finally assigned! Hopefully gets fixed for 1.14.1
I was waiting for so long to see this Issue catching the attention of Mojang, specially in this Update where you can find it more commonly with Illagers and Villagers.

Hopefully MC-96319 gets squashed too, it's another Bug that can be reproduced more commonly in this Update.

Brady Coles 2019-05-04T19:45:42Z

I wonder if this solves other pathfinding issues for villagers. In particular I have noticed, trying to pathfind under trap doors (making a less than two block high space), trying to pathfind over carpets in a two block high space (villagers are too tall), pathfinding to the nearest wall or roof to their workstation, even when a perfectly acceptable path to the workstation exists, pathfinding to glass panes or walls instead of to doors, climbing ladders and getting stuck at the top on a closed trapdoor (and not leaving). And those are just what I've noticed in the past few days.

Carlos G. 2019-05-04T21:16:33Z

I also hope this fix indirectly the obstruction issue that happens in Villagers and of course in other Mobs where they don't count Bamboo, Lanterns and Flower Pots as obstructions, making them try to Pathfind directly through these Blocks resulting in see Mobs often get stuck instead of Pathfind around these Blocks.
I found this when I tried to make a Jungle Village close to a Bamboo Forest and when the Villagers started the "Wander" Schedule they often get stuck around the Bamboo (Most of the times is just 1 Bamboo in front of them what causes the problem), same for Golems, Zombies or any kind of Mob and since I noticed the Reporter of this Issue added a Picture with Bamboo so it might be a double Fix (Hopefully).

GolfinhoVoador 2019-05-05T22:42:19Z

— Villagers and of course in other Mobs where they don't count Bamboo, Lanterns and Flower Pots as obstructions
Same thing to fences. MC-147905

Carlos G. 2019-05-05T23:05:00Z

MC-96319 is also getting fixed. And this Issue is directly the problem with Mobs Pathfind not regarding some Blocks as obstructions (Bamboo, Lanterns, Flower Pots, Mob Heads, End Rods, etc.)
Thankfully both Bugs that raised in this Update due to how common are getting reproduced are finally fixed after Months/Years. Kudos on Henrik for the fix of these Issues.

Jon 2019-05-28T20:26:51Z

Why is this resolved? I have a similar issue on 1.11.4 Bedrock for Nintendo Switch. I’ve seen villagers not being able to reach workstations and beds even when they are on the other side of the door between them. It’s almost as if they don’t know how to use the door half of the time unless it’s open. Villagers end up staying outside at night or run directly into zombies. It’s very annoying because I often see villagers hanging around the overhang of the roof or walking back and forth outside to get to the bed from outside instead of using the door.

Carlos G. 2019-05-28T20:29:57Z

Fixed for Java Edition.

Jon 2019-05-28T22:50:08Z

It’s an issue in bedrock Edition too. Villager path finding is awful. Forget about building two story buildings because Villagers can barely find themselves in a house. They also don’t respond to the bell sometimes. I don’t know if I should create a separate report because there are several issues. I sometimes wish that they never change the formula from doors to beds.

[Mod] violine1101 2019-05-28T22:56:12Z

This section of the bug tracker is for Java Edition only. For Bedrock Edition, please visit the MCPE project.

Noy0 2019-09-06T00:30:16Z

This bug is back again in 19w36a, but may be only when doing certain AI tasks. I've seen a villager path-find into a pair of diagonal fence posts while heading to work. but seem to avoid doing so when doing other things.

[Mod] violine1101 2019-09-09T12:22:02Z

@unknown, if so, please create a new ticket (and link to this ticket in the description).

Noy0 2019-09-09T22:41:23Z

Sorry about that. Though, the bug seems to be different this time around so I've created a ticket for a "different" bug; one regarding villagers path-finding to work (and possibly other targets as well). Because this time around it might just be them path-finding straight to the target as opposed to path-finding thru corners.
MC-160582