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.
Related issues
is duplicated by
MC-134866
Slabs and stairs disappear when placed quickly under falling sand.
MC-172549
Block Disapears When placed in Front of Walking Mob
MC-190858
Blocks disappear upon placing
MC-191288
placeing blocks when chased by baby zombie sometimes makes blocks disapear
MC-194934
Game just "ate" my fence gate?
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Anvil vanishes if a entity walks past as you place
MC-206767
Item disappearing and reappearing
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Blocks disappearing when the area you place them in is obstructed
MC-228777
Beds despawning upon placement (under certain conditions)
MC-228916
Placing a block in an entity causes that block to disappear until you re enter the world
MC-233349
Fence gate disappears when placed where a mob is walking
MC-233662
When 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 placed
MC-235552
Fence holds on to nothing
MC-242351
Cave spider hitting through blocks
MC-258770
When a mob walks infront of a block, block disappears
MC-259934
Blocks disappear when an entity comes in a short window after you place it
MC-260520
A small visual bug
MC-261068
Shulker Box disappears after placing on a Wolf
MC-261474
Block destroying itself if entity hitbox collides with it if placed
MC-261844
Bell disappears if mob walk onto block when you place bell on said block
MC-264421
Lectern disappears when placing and there is a villager in the block
MC-265163
Block disappears after placing as Villager walks in the same spot
MC-267139
Mobs destroy blocks whenever you place a block where they are walking.
MC-267884
Lectern becomes invisible in inventory
MC-271505
When a block is placed in front of an armadillo with a 45° incline, it disappears
MC-271960
Blocks disappear when placed if mob walks on the same block
MC-273111
vanishing blocks
MC-295912
Blocks enter a weird limbo state if entities enter the area they are placed almost instantly.
MC-296338
Blocks disappearing when placed.
MC-298050
bug (block disappearance)
relates to
Attachments
Comments
migrated
violine1101
Can confirm. Can't believe I can't find an earlier ticket about this.
pulpetti
In 20w28a
migrated
Duplicate of MC-95720
migrated
This also happened to me in singleplayer 1.17.
migrated
To clarify:
The block does not disappear completely, it's just a client side desync
Brain81505
Can confirm in 1.19.4
migrated
It is still in your inventory, just click on all of the empty spots till it shows up. This has also happened to me.
Tabor Armando O'Brien Whitehead
This is happening to me. And I lose my precious blocks 😭.