[MC-134866] Slabs and stairs disappear when placed quickly under falling sand.

How to recreate:

Place 2 blocks of sand on top of each other.
Pick a shovel and a stair/slab.
Switch to gamemode survival.
Put the slab/stair in your off-hand.
Dig the lowest sand block and place the slab/stair as soon as the sand is broken.

What's expected to happen:

The sand falls onto the slab/stair, when a slab is used, the sand block breaks and drops itself as soon as it falls onto the slab.
OR
The slab/stair is not placed and stays in the players inventory.

What actually happens:

If you place the stair/slab quickly enough, it disappears until you rejoin the world or place another item in your off-hand.

Related issues

duplicates

MC-163637 Client-server desync when an entity passes through the spot where the player is trying to place a block

Comments

migrated 2018-10-26T20:53:31Z

I managed to recreate this in 18w43c, so I updated the description. I hope it makes more sense now.

migrated 2022-04-14T22:50:51Z

I can confrim in 22w15a

Arisa Bot 2023-10-24T08:41:11Z

Thank you for your report!
We're resolving and linking this ticket forward as a duplicate of MC-163637, as that ticket contains more detailed information and/or has already been triaged by Mojang.

If you would like to add a vote and any extra information to the main ticket it would be appreciated.

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