Mob spawner collision box is smaller than a full block on all sides.
I was playing on a survival world with no cheats on but coordinates were on. Also no resource packs or behavior packs were enabled.
I was standing on cobblestone next to a spawner I found at Y level 37 and then I jumped on top of the spawner and I was still at level 37 even though i was a block higher than that. I tried this with both a skeleton and a zombie spawner and both did the same thing.
How to recreate this bug
Step 1:
Stand by a spawner in survival mode(any mob)
Step 2:
Look at your Y Level
Step 3
Jump on top of the spawner
Step 4 look at your Y level again.
To put this short the Y level didnt change when I jumped on or off the spawner and this only worked with a spawner no other block I tried did this.
I was playing on my Galaxy S7
Linked Issues
is duplicated by8
MCPE-47153mob spawner doesn't give the correct y coordinateDuplicateMCPE-52616Y coordinate level on top of spawner DuplicateMCPE-60491Y-axis coordinate doesn't increase when you jump on a chestDuplicateMCPE-66828Mob spawner has incorrect collision boxDuplicateMCPE-100197Items go through blocks when on top of spawnerDuplicateMCPE-100419Spawner Coordinate Not Working ProperlyDuplicateMCPE-124659Wandering Trader isn't dying when it's on the lava.DuplicateMCPE-154069Stepping on a spawner doesn't increase your Y levelDuplicateAttachments8
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Created Issue:
Y Coord Doesn't Change With Spawner Cage
I was playing on a survival world with no cheats on but coordinates were on. Also no resource packs or behavior packs were enabled.
I was standing on cobblestone next to a spawner I found at Y level 37 and then I jumped on top of the spawner and I was still at level 37 even though i was a block higher than that. I tried this with both a skeleton and a zombie spawner and both did the same thing.
How to recreate this bug
Step 1:
Stand by a spawner in survival mode(any mob)
Step 2:
Look at your Y Level
Step 3
Jump on top of the spawner
Step 4 look at your Y level again.To put this short the Y level didnt change when I jumped on or off the spawner and this only worked with a spawner no other block I tried did this.
I was playing on my Galaxy S7
- Unresolved
- Open
- Unconfirmed
- Android
- Android 8.0.0
- 1.9.0
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is duplicated by
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is duplicated by
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is duplicated by
is duplicated by
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is duplicated by
relates to
![[Helper] lillybeacon](../../../data/avatars/users/93893.png){kind=small}
Y Coord Doesn't Change With Spawner CageMob spawner hitbox is smaller than it should be.
Mob spawner hitbox is smaller than it should be on some sides.
Mob spawner hitbox is smaller thanit shouldbe on somesides.Mob spawner hitbox is smaller than a full block on all sides.
is duplicated by
is duplicated by
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![[Mod] EVGENSYPERPRO](../../../data/avatars/users/92853.png){kind=small}
Mob spawnerhitbox is smaller than a full block on all sides.Mob spawner collision box is smaller than a full block on all sides.
relates to
Thank you for your report!
We're actually already tracking this issue at MCPE-41996, so we will resolve and link this ticket as a duplicate.
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Thank you for your report!
We're actually already tracking this issue at MCPE-41996 which has been closed as Won't Fix.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
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Thank you for your report!
We're tracking this issue in MCPE-41996, so this ticket is being resolved and linked as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Mojang Support – ✍️ Feedback and Suggestions – 📖 Game Wiki
Thank you for your report!
We're tracking this issue in MCPE-41996, so this ticket is being resolved and linked as a duplicate. Spawners are not a full block high so there is "space" above them for blocks.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Mojang Support – ✍️ Feedback and Suggestions – 📖 Game Wiki
Thank you for your report!
We're tracking this issue in MCPE-41996, so this ticket is being resolved and linked as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki
Thank you for your report!
We're tracking this issue in MCPE-41996, so this ticket is being resolved and linked as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki
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This happens because the spawner's collision box is a tiny fraction (.0001 block) less than a block high. Therefore, the bottoms of your feet are actually in the block below your legs when you stand on a spawner. The coordinates on screen are actually the coordinates of the block the bottoms of your feet are in, so they always round toward negative infinity, which means you can't see that your Y coordinate is actually 37.99990. You should find that if you put a carpet, pressure plate, etc. on top of the spawner and stand on that, your coordinates will show Y=38.
We're investigating whether this tiny difference is intentional or a bug. However, as far as we know at present it should have no negative consequences other than the confusion around your coordinates.
Thank you for replying. Sorry this is a late reply. Thanks for letting me know this. I didn't know if this was a bug or not either but I thought it was strange so just wanted to let you know.
Thank you for your report!
However, this issue has been closed as Won't Fix.
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Why is this resolved as won't fix? Trapdoors have the same issue and it got fixed for them in the beta.
Here the bug for trapdoors
MCPE-13451It should be noted that the collision box is smaller on the sides as well, similar to how the trap doors had a slightly smaller collision box than they should have. so when a spawner is on top of a full block, you can still stand on the edge of that full block, even though you shouldn't be able to. This is such a small thing, theres really no reason not to fix it.
Can this please be reopened? It doesn’t make sense to fix the bug for trapdoors, but not for mob spawners which have exactly the same bug.
Reopened for review.
If you have mob spawner next to a slab or stairs you can also walk up on the stairs or slab without jumping, by walking against the mob spawner, as you can see in the video I have attached. To do that you have to not walk in the middle of the mob spawner, you have to collide with the stairs or slab. You also can do the same thing with trapdoors in the versions where trapdoors are also smaller.
Confirmed for 1.16
Could you please mention the impact that this has on gameplay, if any?
MCPE-45875reported an issue where a block whose top surface was below the top of its block frame (as for the spawner in this report) allows the player to walk into the side of a scaffolding block and therefore fall through the scaffolding, possibly to their death. The following attachment fromMCPE-45875illustrates this.If you substitute a spawner for the trapdoor at the center of the top, attempting to walk from the top of the spawner to the top of the scaffolding beside it causes you to fall through the scaffolding.
This is only an issue on the top, the bottom and east and west side, but not on the north and south side. And like I already said if you have stairs or slabs next to the spawner if you walk to east or west, you will be able to walk up the stairs even though you shouldn’t be able to. This is most noticible with the stairs in the end portal room of a stronghold. MCPE-41996.mp4
Also minecarts and boats (and other entities that don’t have the ability to "step" up stairs) can get stuck on top of a mob spawner when next to a full block, causing you to be unable to move it away, like show in this video: MCPE-41996 minecart stuck.mp4
If you or another entity is standing partially on the spawner, you can't place blocks next to it (like this)
If you ride a boat on a spawner you can't move off of it onto adjacent blocks
If you stand on a spawner and a piston pushes you onto an adjacent block, you clip through it
Mobs standing on spawners refuse to pathfind off of them
Now in 1.16.210 it affects all 6 sides and not only 4.
Doing more research and more reproduction tests:
The sides affected depends on position.
If the spawner is before both X and Z coordinate 2048, then 6 sides are affected.
If the spawner is after X or Z 2048 on ONE axis, and before 2048 in THE OTHER axis, then 4 sides are affected.
If the spawner is after both X and Z coordinate 2048, then only the bottom and the top side is affected. (2 sides are affected)
From what i know, this happens because of precision loss. After 2048, the precision error is bigger than the difference between a full block and a mob spawner, making the mob spawner full on some axises.
So @bugsbugsbugs nothing changed in 1.16.210.
This no longer appears to be a bug in 1.19.22. The spawner seems to have normal block dimensions.
Resolving as Fixed. I cannot find a changelog entry for it. There was a change to spawners dropping XP in 1.19.10, so this issue may have been fixed at the same time.