Client-server desync when an entity passes through the spot where the player is trying to place a block
The bug
When placing a block in a spot that an entity is just passing through, the block disappears after being placed, but the player's inventory is not updated properly. A desync occurs when the player tries to place a block at a location where an entity is just passing through it.
Original description
On 1.14.4 I've noticed an issue where if a block is placed the exact moment that an npc walks into the area you are trying to place in the item will disappear. The item will not be returned to the player's inventory, it'll just vanish completely.
This has happened around 3 times, all these occurring when I try and place a lectern and a pesky villager walks onto the area I'm trying to place in.
Unfortunately I don't have any logs for extra information but I hope this was helpful in some way.
Linked Issues
is duplicated by32
MC-134866Slabs and stairs disappear when placed quickly under falling sand.DuplicateMC-172549Block Disapears When placed in Front of Walking MobDuplicateMC-190858Blocks disappear upon placingDuplicateMC-191288placeing blocks when chased by baby zombie sometimes makes blocks disapearDuplicateMC-194934Game just "ate" my fence gate?DuplicateMC-203389Anvil vanishes if a entity walks past as you placeDuplicateMC-206767Item disappearing and reappearingDuplicateMC-210938Blocks disappearing when the area you place them in is obstructedDuplicateMC-228777Beds despawning upon placement (under certain conditions)DuplicateMC-228916Placing a block in an entity causes that block to disappear until you re enter the worldDuplicateMC-233349Fence gate disappears when placed where a mob is walkingDuplicateMC-233662When placing fence inbetween two other fences as an animal is running inbetween them, nothing will be placed, yet the two other fences will extend as if the fence was actually placedDuplicateMC-235552Fence holds on to nothingDuplicateMC-242351Cave spider hitting through blocksDuplicateMC-245799Block deletes itselfDuplicateMC-252299Allay makes block disappear.DuplicateMC-253665Workstation disappearDuplicateMC-253787Phantom BlocksDuplicateMC-254000Block fails to place and instantly disappears when and entity is in the way DuplicateMC-258770When a mob walks infront of a block, block disappearsDuplicateMC-259934Blocks disappear when an entity comes in a short window after you place itDuplicateMC-260520A small visual bugDuplicateMC-261068Shulker Box disappears after placing on a WolfDuplicateMC-261474Block destroying itself if entity hitbox collides with it if placedDuplicateMC-261844Bell disappears if mob walk onto block when you place bell on said blockDuplicateMC-264421Lectern disappears when placing and there is a villager in the blockDuplicateMC-265163Block disappears after placing as Villager walks in the same spotDuplicateMC-267139Mobs destroy blocks whenever you place a block where they are walking.DuplicateMC-267884Lectern becomes invisible in inventoryDuplicateMC-271505When a block is placed in front of an armadillo with a 45° incline, it disappearsDuplicateMC-271960Blocks disappear when placed if mob walks on the same blockDuplicateMC-273111vanishing blocksDuplicate
Important
Low![[Mod] violine1101](../../../data/avatars/users/92858.png){kind=small}
Created Issue:
Blocks disappearing
On 1.14.4 I've noticed an issue where if a block is placed the exact moment that an npc walks into the area you are trying to place in the item will disappear. The item will not be returned to the player's inventory, it'll just vanish completely.
This has happened around 3 times, all these occurring when I try and place a lectern and a pesky villager walks onto the area I'm trying to place in.
Unfortunately I don't have any logs for extra information but I hope this was helpful in some way.
Environment
Windows 10 Home 64-Bit, Java SE 13.
relates to
Blocks disappearingClient-server desync when an entity passes through the spot where the player is trying to place a block
Windows 10 Home 64-Bit, Java SE 13.
The bug
When placing a block in a spot that an entity is just passing through, the block disappears after being placed, but the player's inventory is not updated properly.
Original description
On 1.14.4 I've noticed an issue where if a block is placed the exact moment that an npc walks into the area you are trying to place in the item will disappear. The item will not be returned to the player's inventory, it'll just vanish completely.
This has happened around 3 times, all these occurring when I try and place a lectern and a pesky villager walks onto the area I'm trying to place in.
Unfortunately I don't have any logs for extra information but I hope this was helpful in some way.
is duplicated by
is duplicated by
![[Bot] Arisa](../../../data/avatars/users/43007.png){kind=small}
is duplicated by
is duplicated by
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is duplicated by
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relates to
is duplicated by
is duplicated by
relates to
![[Mod] Chandler](../../../data/assets/gravatar/triwonder81.png){kind=small}
is duplicated by
![[Mod] Michael Wobst](../../../data/avatars/users/37868.png){kind=small}
is duplicated by
is duplicated by
![[Mod] SPGoding](../../../data/avatars/users/44622.png){kind=small}
is duplicated by
![[Mojang] MimmiB](../../../data/avatars/users/18949.svg){kind=small}
Normal![[Mod] Asteraoth](../../../data/avatars/users/92886.png){kind=small}
is duplicated by
is duplicated by
![[Mod] Neko](../../../data/avatars/users/92901.png){kind=small}
is duplicated by
is duplicated by
![[Mod] markderickson](../../../data/avatars/users/18946.svg){kind=small}
is duplicated by
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![[Mojang] slicedlime](../../../data/assets/gravatar/slicedlime.jpeg){kind=small}
is duplicated by
![[Mod] j_p_smith](../../../data/avatars/users/92851.png){kind=small}
![[Mod] turbo](../../../data/avatars/users/92867.png){kind=small}
is duplicated by
is duplicated by
![[Mod] Avoma](../../../data/avatars/users/86198.png){kind=small}
is duplicated by
is duplicated by
is duplicated by
The bug
When placing a block in a spot that an entity is just passing through, the block disappears after being placed, but the player's inventory is not updated properly. A desync occurs when the player tries to place a block at a location where an entity is just passing through it.
Original description
On 1.14.4 I've noticed an issue where if a block is placed the exact moment that an npc walks into the area you are trying to place in the item will disappear. The item will not be returned to the player's inventory, it'll just vanish completely.
This has happened around 3 times, all these occurring when I try and place a lectern and a pesky villager walks onto the area I'm trying to place in.
Unfortunately I don't have any logs for extra information but I hope this was helpful in some way.
is duplicated by
Thank you for your report!
We're actually already tracking this issue in MC-163637, so I resolved and linked this ticket as a duplicate.
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Thank you for your report!
We're tracking this issue in MC-163637, so this ticket is being resolved and linked as a duplicate.
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Thank you for your report!
However, we are already tracking this issue, and this report is a Duplicate of MC-163637, which is a report that has not been resolved yet.
If you want, you can upvote the parent ticket, and enable watching to receive any updates about it - if you believe you have any information that may be important for this issue, please leave a comment on the parent. Please also use the search function in the future to prevent duplicate reports.
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Duplicate of MC-163637
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Thank you for your report!
We're tracking this issue in MC-163637, so this ticket is being resolved and linked as a duplicate.
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Thank you for your report!
We're tracking this issue in MC-163637, so this ticket is being resolved and linked as a duplicate.
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Thank you for your report!
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Thank you for your report!
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Thank you for your report!
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Duplicate of MC-163637.
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Duplicate of MC-163637.
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Would MC-163637 happen to describe your issue? If not, please could you provide a copy of your world so that the problem can be further investigated? Thanks 
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How has this got anything to do with MC-163637, that's about de-syncing block placement, and mine is to do with cave spiders being able to hit through walls. What do those 2 have in common?
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Duplicate of MC-163637
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Duplicate of MC-163637.
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Duplicate of MC-163637.
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Oh, oops, meant to paste MC-163637.
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Duplicate of MC-163637.
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Duplicate of MC-163637.
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Dupe of MC-163637
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Duplicate of MC-163637.
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Duplicate of MC-163637.
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Duplicate of MC-163637.
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Dupe of MC-163637
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Duplicate of MC-163637.
Duplicate of MC-163637.
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Would MC-163637 happen to describe your issue here? If not, please follow the instructions provided in the comment by [Mod] Jarl-Penguin.
Can confirm. Can't believe I can't find an earlier ticket about this.
In 20w28a
Duplicate of MC-95720
This also happened to me in singleplayer 1.17.
To clarify:
The block does not disappear completely, it's just a client side desync
Can confirm in 1.19.4
It is still in your inventory, just click on all of the empty spots till it shows up. This has also happened to me.